Just for understanding purpose the following are the details :-
As per the CIC guidelines and last years stats for Access to Information Act :
The majority of exemptions CIC invoked fell under three sections of the Access to Information Act:
subsection 19(1), which protects personal information, was used in 10,377 cases (57 percent);
subsection 15(1), which covers international relations, defence and subversive activities, was used in 5,494 cases (30 percent);
subsection 16(1), which addresses law enforcement and criminal investigations, was used in 2,563 cases (25 percent).
It should be noted that more than one subsection can be applied to a specific request.
Hope it helps
Sunny