Jan ( N = 256 )

Feb ( N = 287 )

Mar ( N = 361 )

Apr ( N = 403 )

May ( N = 463 )

Jun ( N = 428 )

Jul ( N = 461 )

Aug ( N = 446 )

Sep ( N = 386 )

Oct ( N = 336 )

Nov ( N = 258 )

Dec ( N = 150 )