Jan ( N = 17 )

Feb ( N = 20 )

Mar ( N = 26 )

Apr ( N = 209 )

May ( N = 1488 )

Jun ( N = 662 )

Jul ( N = 31 )

Aug ( N = 28 )

Sep ( N = 30 )

Oct ( N = 29 )

Nov ( N = 25 )

Dec ( N = 20 )