Jan ( N = 76 )

Feb ( N = 196 )

Mar ( N = 308 )

Apr ( N = 300 )

May ( N = 300 )

Jun ( N = 299 )

Jul ( N = 309 )

Aug ( N = 310 )

Sep ( N = 323 )

Oct ( N = 341 )

Nov ( N = 279 )

Dec ( N = 322 )