Jan ( N = 29 )

Feb ( N = 28 )

Mar ( N = 27 )

Apr ( N = 395 )

May ( N = 455 )

Jun ( N = 445 )

Jul ( N = 448 )

Aug ( N = 449 )

Sep ( N = 439 )

Oct ( N = 449 )

Nov ( N = 449 )

Dec ( N = 452 )