Jan ( N = 2 )

Mar ( N = 1782 )

Apr ( N = 2188 )

May ( N = 2233 )

Jun ( N = 2170 )

Jul ( N = 2245 )

Aug ( N = 2261 )

Sep ( N = 2190 )

Oct ( N = 2251 )

Nov ( N = 2189 )

Dec ( N = 2227 )