Jan ( N = 75 )

Feb ( N = 49 )

Mar ( N = 80 )

Apr ( N = 107 )

May ( N = 240 )

Jun ( N = 230 )

Jul ( N = 263 )

Aug ( N = 330 )

Sep ( N = 267 )

Oct ( N = 331 )

Nov ( N = 280 )

Dec ( N = 279 )