Jan ( N = 39 )
Feb ( N = 115 )
Mar ( N = 113 )
Apr ( N = 119 )
May ( N = 124 )
Jun ( N = 110 )
Aug ( N = 23 )
Nov ( N = 92 )
Dec ( N = 114 )
Feb ( N = None )
Mar ( N = None )
Apr ( N = 104 )
May ( N = 231 )
Jun ( N = 240 )
Jul ( N = 232 )
Aug ( N = 240 )
Sep ( N = 238 )
Oct ( N = 247 )
Nov ( N = 180 )
