Jan ( N = 1004 )

Feb ( N = 923 )

Mar ( N = 1023 )

Apr ( N = 982 )

May ( N = 978 )

Jun ( N = 990 )

Jul ( N = 995 )

Aug ( N = 1023 )

Sep ( N = 985 )

Oct ( N = 1024 )

Nov ( N = 967 )

Dec ( N = 1003 )