Jan ( N = 160 )

Feb ( N = 249 )

Mar ( N = 268 )

Apr ( N = 290 )

May ( N = 310 )

Jun ( N = 298 )

Jul ( N = 310 )

Aug ( N = 299 )

Sep ( N = 167 )

Oct ( N = 272 )

Nov ( N = 120 )

Dec ( N = 230 )