Jan ( N = 538 )

Feb ( N = 429 )

Mar ( N = 516 )

Apr ( N = 536 )

May ( N = 554 )

Jun ( N = 461 )

Jul ( N = 552 )

Aug ( N = 548 )

Sep ( N = 540 )

Oct ( N = 550 )

Nov ( N = 532 )

Dec ( N = 545 )