Feb ( N = 53 )

Mar ( N = 181 )

Apr ( N = 70 )

May ( N = 160 )

Jun ( N = 409 )

Jul ( N = 737 )

Aug ( N = 1163 )

Sep ( N = 1133 )

Oct ( N = 1015 )

Nov ( N = 1062 )

Dec ( N = 1176 )