Jan ( N = 310 )

Feb ( N = 274 )

Mar ( N = 307 )

Apr ( N = 297 )

May ( N = 302 )

Jun ( N = 300 )

Jul ( N = 310 )

Aug ( N = 310 )

Sep ( N = 300 )

Oct ( N = 237 )

Nov ( N = 300 )

Dec ( N = 309 )