Jan ( N = 91 )

Feb ( N = 76 )

Mar ( N = 237 )

Apr ( N = 234 )

May ( N = 238 )

Jun ( N = 181 )

Jul ( N = 198 )

Aug ( N = 196 )

Sep ( N = 224 )

Oct ( N = 230 )

Nov ( N = 156 )

Dec ( N = 247 )