Jan ( N = 86 )

Feb ( N = 71 )

Mar ( N = 236 )

Apr ( N = 237 )

May ( N = 227 )

Jun ( N = 177 )

Jul ( N = 186 )

Aug ( N = 183 )

Sep ( N = 224 )

Oct ( N = 232 )

Nov ( N = 156 )

Dec ( N = 244 )