Jan ( N = 27 )

Feb ( N = 15 )

Mar ( N = 31 )

Apr ( N = 28 )

May ( N = 31 )

Jun ( N = 26 )

Jul ( N = 23 )

Aug ( N = 74 )

Sep ( N = 349 )

Oct ( N = 271 )

Nov ( N = 327 )

Dec ( N = 289 )