Jan ( N = 93 )
Feb ( N = 84 )
Mar ( N = 66 )
Apr ( N = 30 )
May ( N = 69 )
Jun ( N = 21 )
Jul ( N = 93 )
Aug ( N = 93 )
Sep ( N = 90 )
Oct ( N = 93 )
Nov ( N = 90 )
Dec ( N = 89 )