*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan57501063
Feb190035054
Mar00181082
Apr0003884392
May0017647120784
Jun0061488159708
Jul004921816283
Aug0072726285
Sep0002791280
Oct0002751276
Nov0001640164
Dec24900300279
Total325513528783073650