*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002222
Feb00701219
Mar469000100
Apr235141300487
May181945800495
Jun613037800469
Jul1762936800573
Aug19845500482
Sep2244000444
Oct0011200112
Nov00370037
Dec001608399
Total303145277401173339