Jan ( N = 517 )

Feb ( N = 478 )

Mar ( N = 523 )

Apr ( N = 518 )

May ( N = 548 )

Jun ( N = 518 )

Jul ( N = 544 )

Aug ( N = 739 )

Sep ( N = 1068 )

Oct ( N = 1094 )

Nov ( N = 1052 )

Dec ( N = 1072 )