*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004723727
Feb002550287542
Mar1247800481
Apr11443100446
May77687100846
Jun161224104001344
Jul1430360500922
Aug0565400659
Sep0058800588
Oct0043600436
Nov0032200322
Dec0016309521115
Total3923164107419628428