Jan ( N = 80 )

Feb ( N = 98 )

Mar ( N = 270 )

Apr ( N = 468 )

May ( N = 481 )

Jun ( N = 479 )

Jul ( N = 481 )

Aug ( N = 494 )

Sep ( N = 479 )

Oct ( N = 399 )

Nov ( N = 203 )

Dec ( N = 14 )