Check this link:
http://www.cic.gc.ca/english/pdf/research-stats/facts2009.pdf
For e.g. in 2009, in FSW Class, PA admitted (Visas issued) were 40,735 & their spouses & dependents at 55,227.
In 2009, PA admitted were 136529 against a total of 252179. So 115650 were spouses & dependents.