*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000283283
Feb00691105175
Mar0113900140
Apr11053700548
May172393500975
Jun183068900737
Jul233750700567
Aug26756500598
Sep4086400868
Oct0025000250
Nov0013300133
Dec10742391468
Total90108476237795742