Jan ( N = 1036 )

Feb ( N = 957 )

Mar ( N = 1072 )

Apr ( N = 1108 )

May ( N = 1137 )

Jun ( N = 1088 )

Jul ( N = 1150 )

Aug ( N = 1134 )

Sep ( N = 1101 )

Oct ( N = 1146 )

Nov ( N = 987 )

Dec ( N = 1145 )