Jan ( N = 172 )

Feb ( N = 158 )

Mar ( N = 135 )

Apr ( N = 246 )

May ( N = 274 )

Jun ( N = 252 )

Jul ( N = 159 )

Aug ( N = 256 )

Sep ( N = 235 )

Oct ( N = 273 )

Nov ( N = 268 )

Dec ( N = 271 )