*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan13510093157
Feb38195517120
Mar00348678198
Apr006296199357
May006920131301
Jun005436483501
Jul002515926210
Aug0051242131
Sep0041256135
Oct0001101111
Nov10081082
Dec57420491626
Total7481326214594472929