These are the noon-time US<->Canadian Dollar Exchange Rates. The source of this information is the Bank of Canada.

This information is for the month of March, year 2009. 

These are nominal values, rather than actual "sell" or "buy" rates, so they're best used for comparison or statistical purposes. Having said that, there's no "official" exchange rate either. 

Date	Value
30/03/2009	1.2590
27/03/2009	1.2392
26/03/2009	1.2330
25/03/2009	1.2245
24/03/2009	1.2262
23/03/2009	1.2323
20/03/2009	1.2371
19/03/2009	1.2325
18/03/2009	1.2720
17/03/2009	1.2718
16/03/2009	1.2724
13/03/2009	1.2749
12/03/2009	1.2905
11/03/2009	1.2807
10/03/2009	1.2797
09/03/2009	1.3000
06/03/2009	1.2863
05/03/2009	1.2877
04/03/2009	1.2765
03/03/2009	1.2938
02/03/2009	1.2890
27/02/2009	1.2707