*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00528491
Feb005512581
Mar11419200207
Apr17042000491
May131063882001958
Jun6560861200007351
Jul561016521001593
Aug1624200249
Sep1512400130
Oct00780078
Nov00190019
Dec00220401423
Total13882603760351012671