*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00124132157
Feb0076545126
Mar0213300135
Apr35629600355
May84721586002066
Jun3911363911005086
Jul397521924002715
Aug22332800353
Sep2627500283
Oct0015700157
Nov00790079
Dec00483367418
Total93244788143254411930