*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005270275
Feb13700116190
Mar02513500160
Apr1239200116
May4610100111
Jun51712100143
Jul55560066
Aug24530059
Sep11820084
Oct1113900141
Nov2013300135
Dec00720305377
Total2285105456911857