*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000022
Feb012014
Mar104590073
Apr271901730002091
May355863061003502
Jun3891462878003413
Jul604472804003455
Aug154322104002290
Sep29131070001112
Oct3012100124
Nov00120012
Dec003047
Total1815419138440716085