Jan ( N = 341 )

Feb ( N = 308 )

Mar ( N = 341 )

Apr ( N = 294 )

May ( N = 326 )

Jun ( N = 276 )

Jul ( N = 309 )

Aug ( N = 326 )

Sep ( N = 321 )

Oct ( N = 338 )

Nov ( N = 325 )

Dec ( N = 341 )