Jan ( N = 28 )

Feb ( N = 21 )

Mar ( N = 27 )

Apr ( N = 44 )

May ( N = 39 )

Jun ( N = 28 )

Jul ( N = 42 )

Aug ( N = 30 )

Sep ( N = 17 )

Oct ( N = 38 )

Nov ( N = 47 )

Dec ( N = 14 )