*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0006920926
Feb302111307522
Mar1334900353
Apr121341200437
May21936000390
Jun704129700408
Jul691428800371
Aug4938800401
Sep1094100942
Oct0164700648
Nov0038000380
Dec0025408371091
Total181904527720646869