Jan ( N = 545 )

Feb ( N = 500 )

Mar ( N = 518 )

Apr ( N = 451 )

May ( N = 515 )

Jun ( N = 513 )

Jul ( N = 433 )

Aug ( N = 380 )

Sep ( N = 367 )

Oct ( N = 409 )

Nov ( N = 437 )

Dec ( N = 516 )