Some figures from last year's competition 2011-2012 that includes both SSHRC and Joseph-Armand Bombardier CGS. http://www.sshrc-crs.../index-eng.aspx
402 direct submissions. 93 made the A list and 59 were awarded a scholarship.
4,567 university submissions. 1, 814 made the A list and 1,026 were awarded a scholarship
430 applicants for foreign study. 130 made the A list and 104 were awarded a scholarship.
Total applications 4,969. 1,907 made the A list and 1,085 or 57 percent were awarded a scholarship.
Regardless of one's specific category, the odds seem pretty good if you made the A list. There are of course other figures based on institution, province, discipline and year of doctoral studies etc, that can be accessed via the link above.
Good luck everyone!!!