Jan ( N = 172 )

Feb ( N = 204 )

Mar ( N = 237 )

Apr ( N = 237 )

May ( N = 242 )

Jun ( N = 236 )

Jul ( N = 228 )

Aug ( N = 229 )

Sep ( N = 234 )

Oct ( N = 240 )

Nov ( N = 240 )

Dec ( N = 236 )