Jan ( N = 310 )

Feb ( N = 227 )

Mar ( N = 222 )

Apr ( N = 300 )

May ( N = 308 )

Jun ( N = 299 )

Jul ( N = 254 )

Aug ( N = 295 )

Sep ( N = 249 )

Oct ( N = 308 )

Nov ( N = 300 )

Dec ( N = 310 )