*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00014792806
Feb15312701262579
Mar12815358900870
Apr17226954600987
May19253894001139
Jun12097933001150
Jul593659200687
Aug151550200532
Sep71358300603
Oct2238600390
Nov1132300325
Dec0119729171117
Total71167158151719719185