Pr'haps it's a girl thing, this numbers lark!!
Anyway, my theory .... the CAA compile figures based on those who held medicals. However, although the figures are published for 2005, they are probably based on medicals from around three years earlier i.e. 2002 which would work (I think). I'm sorry but I can't imagine that the CAA are that up to date with their data especially after what DRK said about them not even having the figures for post-60 medical holders vs accidents.
Cheers
Whirls