Jan ( N = 151 )

Feb ( N = 223 )

Mar ( N = 308 )

Apr ( N = 298 )

May ( N = 270 )

Jun ( N = 271 )

Jul ( N = 276 )

Aug ( N = 307 )

Sep ( N = 296 )

Oct ( N = 302 )

Nov ( N = 299 )

Dec ( N = 307 )