Jan ( N = 521 )

Feb ( N = 471 )

Mar ( N = 522 )

Apr ( N = 498 )

May ( N = 488 )

Jun ( N = 500 )

Jul ( N = 449 )

Aug ( N = 419 )

Sep ( N = 418 )

Oct ( N = 380 )

Nov ( N = 297 )

Dec ( N = 309 )