Jan ( N = 54 )

Feb ( N = 79 )

Mar ( N = 235 )

Apr ( N = 232 )

May ( N = 236 )

Jun ( N = 181 )

Jul ( N = 196 )

Aug ( N = 194 )

Sep ( N = 218 )

Oct ( N = 230 )

Nov ( N = 144 )

Dec ( N = 222 )