*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0025112119
Feb002723867
Mar0346054003514
Apr3941142001086
May914719900355
Jun3018326800481
Jul23348800145
Aug9710400120
Sep23550060
Oct049900103
Nov02680070
Dec00340305339
Total764781114074556459