Jan ( N = 1004 )

Feb ( N = 956 )

Mar ( N = 1013 )

Apr ( N = 1075 )

May ( N = 1175 )

Jun ( N = 1100 )

Jul ( N = 1162 )

Aug ( N = 1171 )

Sep ( N = 1135 )

Oct ( N = 1176 )

Nov ( N = 1138 )

Dec ( N = 1177 )