Jan ( N = 31 )

Feb ( N = 28 )

Mar ( N = 13 )

Apr ( N = 19 )

May ( N = 599 )

Jun ( N = 1556 )

Jul ( N = 2976 )

Aug ( N = 2976 )

Sep ( N = 2656 )

Oct ( N = 2731 )

Nov ( N = 738 )

Dec ( N = 2753 )