Jan ( N = 423 )

Feb ( N = 431 )

Mar ( N = 481 )

Apr ( N = 424 )

May ( N = 512 )

Jun ( N = 502 )

Jul ( N = 474 )

Aug ( N = 397 )

Sep ( N = 413 )

Oct ( N = 367 )

Nov ( N = 334 )

Dec ( N = 389 )