Jan ( N = 1024 )

Feb ( N = 960 )

Mar ( N = 1194 )

Apr ( N = 1170 )

May ( N = 1172 )

Jun ( N = 1165 )

Jul ( N = 1207 )

Aug ( N = 1209 )

Sep ( N = 1170 )

Oct ( N = 1205 )

Nov ( N = 561 )

Dec ( N = 663 )