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ARX.A Exchangeable Shares

• 2010

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  29/01/2010	2.73316	0.10	20.6402	0.01324	15/02/2010	2.74640
  26/02/2010	2.74640	0.10	21.8030	0.01260	15/03/2010	2.75900
  31/03/2010	2.75900	0.10	21.2969	0.01295	15/04/2010	2.77195
  30/04/2010	2.77195	0.10	21.8107	0.01271	17/05/2010	2.78466
  31/05/2010	2.78466	0.10	20.1467	0.01382	15/06/2010	2.79848
  30/06/2010	2.79848	0.10	21.1588	0.01323	15/07/2010	2.81171
  30/07/2010	2.81171	0.10	20.3679	0.01380	16/08/2010	2.82551
  31/08/2010	2.82551	0.10	19.3165	0.01463	15/09/2010	2.84014
  30/09/2010	2.84014	0.10	20.2962	0.01399	15/10/2010	2.85413
  29/10/2010	2.85413	0.10	21.1988	0.01346	15/11/2010	2.86759
  30/11/2010	2.86759	0.10	23.6325	0.01213	15/12/2010	2.87972
  31/12/2010	2.87972	0.10	24.2067	0.01190	31/12/2010	2.89162

• 2009

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2009	2.53682	0.12	16.8233	0.01810	16/02/2009	2.55492
  27/02/2009	2.55492	0.12	14.1096	0.02173	16/03/2009	2.57665
  31/03/2009	2.57665	0.12	14.6800	0.02106	15/04/2009	2.59771
  30/04/2009	2.59771	0.12	15.4789	0.02014	15/05/2009	2.61785
  29/05/2009	2.61785	0.10	16.5667	0.01580	15/06/2009	2.6365
  30/06/2009	2.63365	0.10	17.2779	0.01524	15/07/2009	2.64889
  31/07/2009	2.64889	0.10	17.2340	0.01537	17/08/2009	2.66426
  31/08/2009	2.66426	0.10	17.5479	0.01518	15/09/2009	2.67944
  30/09/2009	2.67944	0.10	19.0758	0.01405	15/10/2009	2.69349
  30/10/2009	2.69349	0.10	20.7836	0.01296	16/11/2009	2.70645
  30/11/2009	2.70645	0.10	20.6942	0.01308	15/12/2009	2.71953
  31/12/2009	2.71953	0.10	19.9573	0.01363	15/01/2010	2.73316

• 2008

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2008	2.27289	0.15	21.1480	0.021495	15/02/2008	2.29439
  29/02/2008	2.29439	0.20	23.7049	0.01936	17/03/2008	2.31375
  31/03/2008	2.31375	0.24	25.9728	0.01782	15/04/2008	2.33157
  30/04/2008	2.33157	0.24	26.8467	0.01737	15/05/2008	2.34894
  31/05/2008	2.34894	0.28	30.2471	0.01864	16//06/2008	2.36758
  30/06/2008	2.36758	0.28	31.4796	0.01805	15/07/2008	2.38563
  31/07/2008	2.38563	0.24	30.1416	0.02216	15/08/2008	2.40779
  31/08/2008	2.40779	0.24	29.4551	0.02289	15/09/2008	2.43068
  30/09/2008	2.43068	0.20	24.0848	0.02422	15/10/2008	2.45490
  31/10/2008	2.45490	0.20	16.6359	0.03542	17/11/2008	2.49032
  30/11/2008	2.49032	0.20	18.8914	0.02636	15/12/2008	2.51668
  31/12/2008	2.51668	0.20	18.7416	0.02014	15/01.2009	2.53682

• 2007

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2007	2.03013	0.20	21.6414	0.01876	15/02/2007	2.04889
  28/02/2007	2.04889	0.20	21.8628	0.01874	15/03/2007	2.06763
  31/03/2007	2.06763	0.20	21.4752	0.01926	16/04/2007	2.08689
  30/04/2007	2.08689	0.20	21.8214	0.01913	15/05/2007	2.10602
  31/05/2007	2.10602	0.20	23.1662	0.01818	15/06/2007	2.12420
  30/06/2007	2.12420	0.20	22.4112	0.01896	16/07/2007	2.14316
  31/07/2007	2.14316	0.20	21.7903	0.01967	15/08/2007	2.16283
  31/08/007	2.16283	0.20	19.9767	0.02165	17/09/2007	2.18448
  30/09/2007	2.18448	0.20	20.7380	0.02107	15/10/2007	2.20555
  31/10/2007	2.20555	0.20	21.0600	0.02095	15/11/2007	2.22650
  30/11/2007	2.22650	0.20	19.1435	0.02326	17/12/2007	2.24976
  31/12/2007	2.24976	0.20	19.4544	0.02313	15/01/2008	2.27289

• 2006

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2006	1.85382	0.20	26.6057	0.01394	15/02/2006	1.86776
  28/02/2006	1.86776	0.20	26.5028	0.01409	15/03/2006	1.88185
  31/03/2006	1.88185	0.20	26.7598	0.01406	17/04/2006	1.89591
  30/04/2006	1.89591	0.20	27.2304	0.01392	15/05/2006	1.90983
  31/05/2006	1.90983	0.20	27.3961	0.01394	15/06/2006	1.92377
  30/06/2006	1.92377	0.20	26.5335	0.01450	17/07/2006	1.93827
  31/07/2006	1.93827	0.20	28.3176	0.01369	15/08/2006	1.95196
  21/08/2006	1.95196	0.20	29.8957	0.01306	15/09/2006	1.96502
  30/09/2006	1.96502	0.20	29.1962	0.01500	16/10/2006	1.98002
  31/10/2006	1.98002	0.20	28.2102	0.01404	15/11/2006	1.99406
  30/11/2006	1.99406	0.20	21.6207	0.01845	15/12/2006	2.01251
  31/12/2006	2.01251	0.20	22.8430	0.01762	15/01/2007	2.03013

• 2005

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2005	1.68606	0.15	19.0697	0.01326	15/02/2005	1.69932
  28/02/2005	1.69932	0.15	19.1253	0.01333	15/03/2005	1.71265
  31/03/2005	1.71265	0.15	17.9336	0.01432	15/04/2005	1.72697
  30/04/2005	1.76297	0.15	17.5257	0.01478	16/05/2005	1.74175
  31/05/2005	1.74175	0.15	18.4061	0.01419	15/06/2005	1.75594
  30/06/2005	1.75594	0.15	19.8477	0.01327	15/07/2005	1.76921
  31/07/2005	1.76921	0.15	21.7221	0.01222	15/08/2005	1.78143
  31/08/2005	1.78143	0.17	21.7902	0.01390	15/09/2005	1.79533
  30/09/2005	1.79533	0.17	22.9526	0.01330	17/10/2005	1.80863
  31/10/2005	1.80863	0.20	21.7266	0.01665	15/11/2005	1.82528
  30/11/2005	1.82528	0.20	24.8707	0.01468	15/12/2005	1.83996
  31/12/2005	1.83996	0.20	26.5567	0.01386	16/01/2006	1.85382

• 2004

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2004	1.50565	0.15	14.7200	0.01534	16/02/2004	1.52099
  29/02/2004	1.52099	0.15	15.0203	0.01519	15/03/2004	1.53618
  31/03/2004	1.53618	0.15	15.5092	0.01486	15/04/2004	1.55104
  30/04/2004	1.55104	0.15	15.2030	0.01530	17/05/2004	1.56634
  31/05/2004	1.56634	0.15	15.0127	0.01565	15/06/2004	1.58199
  30/06/2004	1.58199	0.15	15.0005	0.01582	15/07/2004	1.59781
  31/07/2004	1.59781	0.15	15.8894	0.01508	16/08/2004	1.61289
  31/08/2004	1.61289	0.15	15.8229	0.01529	15/09/2004	1.62818
  30/09/2004	1.62818	0.15	16.8533	0.01449	15/10/2004	1.64267
  31/10/2004	1.64267	0.15	16.7862	0.01468	15/11/2004	1.65735
  30/11/2004	1.65735	0.15	17.1654	0.01448	15/12/2004	1.67183
  31/12/2004	1.67183	0.15	17.6229	0.01423	17/01/2005	1.68606

• 2003

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2003	1.32433	0.15	12.1899	0.01231	17/02/2003	1.33664
  28/02/2003	1.33664	0.15	11.6256	0.01290	17/03/2003	1.34954
  31/03/2003	1.34954	0.15	11.3057	0.01327	15/04/2003	1.36281
  30/04/2003	1.36281	0.15	11.7540	0.01276	15/05/2003	1.37557
  31/05/2003	1.37577	0.15	12.1549	0.01698	16/06/2003	1.39255
  30/06/2003	1.39255	0.15	12.6313	0.01654	15/07/2003	1.40909
  31/07/2003	1.40909	0.15	12.7184	0.01662	15/08/2003	1.42571
  31/08/2003	1.42571	0.15	13.5630	0.01577	15/09/2003	1.44148
  30/09/2003	1.44148	0.15	13.2979	0.01626	15/10/2003	1.45774
  31/10/2003	1.45774	0.15	13.7274	0.01593	17/11/2003	1.47367
  30/11/2003	1.47367	0.15	13.4328	0.01646	15/12/2003	1.49013
  31/12/2003	1.49013	0.15	14.4024	0.01552	15/01/2004	1.50565

• 2002

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2002	1.19699	0.13	11.9889	0.01084	15/02/2002	1.20783
  28/02/2002	1.20783	0.13	11.7938	0.01102	15/03/2002	1.21885
  31/03/2002	1.21885	0.13	12.9656	0.01003	15/04/2002	1.22888
  30/04/2002	1.22888	0.13	12.6352	0.01029	15/05/2002	1.23917
  31/05/2002	1.23917	0.13	12.2072	0.01065	15/06/2002	1.24982
  30/06/2002	1.24982	0.13	12.5538	0.01036	15/07/2002	1.26018
  31/07/2002	1.26018	0.13	12.2235	0.01064	15/08/2002	1.27082
  31/08/2002	1.27082	0.13	12.7015	0.01024	15/09/2002	1.28106
  30/09/2002	1.28106	0.13	12.6859	0.01025	15/10/2002	1.29131
  31/10/2002	1.29131	0.13	12.2978	0.01057	15/11/2002	1.30188
  30/11/2002	1.30188	0.13	11.1855	0.01162	16/12/2002	1.31350
  31/12/2002	1.31350	0.13	12.0041	0.01083	15/01/2003	1.32433

• 2001

  Record Date Distribution	Opening Exchange Ratio	Trust Unit Distribution (CDN$)	10 Day Weighted Average Price (CDN$)	Increase in Exchange Ratio**	Effective Date of Increase in Exchange Ratio	Exchange Ratio as of Effective Date
  31/01/2001	1.00000	0.20	12.9656	0.01764	15/02/2001	1.01764
  28/02/2001	1.01764	0.20	11.5610	0.01730	15/03/2001	1.03494
  31/03/2001	1.03494	0.20	11.4637	0.01745	15/04/2001	1.05239
  30/04/2001	1.05239	0.22	12.2839	0.01791	15/05/2001	1.07030
  31/05/2001	1.07030	0.22	13.2443	0.01661	15/06/2001	1.08691
  30/06/2001	1.08691	0.22	11.7841	0.01867	15/07/2001	1.10558
  31/07/2001	1.10558	0.20	11.4331	0.01749	15/08/2001	1.12307
  31/08/2001	1.12307	0.20	12.3580	0.01618	15/09/2001	1.13925
  30/09/2001	1.13925	0.20	11.1457	0.01794	15/10/2001	1.15719
  31/10/2001	1.15719	0.15	11.1594	0.01344	15/11/2001	1.17063
  30/11/2001	1.17063	0.15	11.0412	0.01102	15/12/2001	1.18422
  31/12/2001	1.18422	0.15	11.7491	0.01084	15/01/2002	1.19699