Jan ( N = 256 )

Feb ( N = 229 )

Mar ( N = 235 )

Apr ( N = 233 )

May ( N = 226 )

Jun ( N = 217 )

Jul ( N = 212 )

Aug ( N = 199 )

Sep ( N = 213 )

Oct ( N = 185 )

Nov ( N = 184 )

Dec ( N = 185 )