Jan ( N = 262 )

Feb ( N = 252 )

Mar ( N = 277 )

Apr ( N = 266 )

May ( N = 267 )

Jun ( N = 270 )

Jul ( N = 273 )

Aug ( N = 278 )

Sep ( N = 265 )

Oct ( N = 278 )

Nov ( N = 266 )

Dec ( N = 279 )