*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002222
Feb00701219
Mar469000100
Apr234740900479
May181945700494
Jun612837700466
Jul1762436800568
Aug19845500482
Sep2244000444
Oct0011200112
Nov00370037
Dec001608399
Total303134276801173322