*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002119651986
Feb0464436221273
Mar2181372001392
Apr3141335001352
May4352430002469
Jun5422127002174
Jul1121424001437
Aug251093001100
Sep0185700858
Oct0160900610
Nov0049300493
Dec00311010471358
Total171321269524363416502