Jan ( N = 300 )

Feb ( N = 304 )

Mar ( N = 292 )

Apr ( N = 325 )

May ( N = 320 )

Jun ( N = 276 )

Jul ( N = 310 )

Aug ( N = 310 )

Sep ( N = 313 )

Oct ( N = 340 )

Nov ( N = 308 )

Dec ( N = 201 )