*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003138363867
Feb071356614962865
Mar9262556002591
Apr7752536002618
May204999388005407
Jun707068372007510
Jul4918512757004657
Aug9292670002708
Sep162409002416
Oct011861001862
Nov031507001510
Dec00815833304153
Total165140651922745866242164