Jan ( N = 258 )

Feb ( N = 281 )

Mar ( N = 340 )

Apr ( N = 330 )

May ( N = 333 )

Jun ( N = 328 )

Jul ( N = 318 )

Aug ( N = 341 )

Sep ( N = 330 )

Oct ( N = 415 )

Nov ( N = 501 )

Dec ( N = 528 )