*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0007883890
Feb18272971324667
Mar13114765000928
Apr158267598001023
May21650978001244
Jun128981064001290
Jul653668500786
Aug162067200708
Sep81375100772
Oct2148700490
Nov1141300415
Dec01238210441285
Total743661683310225110498