*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003137140
Feb0143162107
Mar0010600106
Apr02800082
May12793300313
Jun106752500710
Jul217832200502
Aug1216400167
Sep1211100114
Oct00700070
Nov00580058
Dec00390266305
Total151139105144652674