Jan ( N = 1 )

Mar ( N = 1782 )

Apr ( N = 2188 )

May ( N = 2234 )

Jun ( N = 2168 )

Jul ( N = 2245 )

Aug ( N = 2263 )

Sep ( N = 2190 )

Oct ( N = 2252 )

Nov ( N = 2188 )

Dec ( N = 2231 )