Jan ( N = 86 )

Feb ( N = 92 )

Mar ( N = 226 )

Apr ( N = 171 )

May ( N = 234 )

Jun ( N = 198 )

Jul ( N = 224 )

Aug ( N = 208 )

Sep ( N = 230 )

Oct ( N = 229 )

Nov ( N = 236 )

Dec ( N = 247 )