*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0008533541
Feb001512167320
Mar72329200322
Apr51229500312
May3742417000631
Jun9173614100968
Jul1077479800979
Aug323858500655
Sep10445100465
Oct0023700237
Nov0016500165
Dec001212868991
Total289131134061215686586