*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0009104113
Feb0085225112
Mar0411600120
Apr43516400203
May141309276001599
Jun53127086020013363
Jul191818236002073
Aug2614700155
Sep02960098
Oct00670067
Nov00590059
Dec00410484525
Total921588218891161318487