2,862,000,000 Canadian Dollars. Source is [url=http://www.acdi-cida.gc.ca/INET/IMAGES.NSF/vLUImages/Publications/$file/StatisticalReport-ENG-2008-04-29_SM.pdf]here[/url]. The info is taken from a bar chart at the top right of page 3. This PDF is no longer listed directly on their site (the site only goes back to 2007), but it is still indexed by Google if you use the right search term.

EDIT: I haven't read the report in full, merely skimmed for what seemed to be the appropriate information, so I suggest you double-check this is the correct figure. For example, I'm not sure if this figure is total expenditure, or whether it's simply the portion of the ODA spent by CIDA and not the total (say, if they receive funding from other sources and spent that) or whether they went over-budget, or what.