*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004192196
Feb00145064209
Mar171643001651
Apr5181374001397
May37761372001485
Jun431311087001261
Jul31819000229
Aug7222100230
Sep0126800269
Oct0029500295
Nov0017600176
Dec00670382449
Total124243683846387847