*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005253258
Feb002206284
Mar01670068
Apr15886400923
May92883589003481
Jun1536772405006097
Jul152981199001512
Aug4257700583
Sep1437400379
Oct0133600337
Nov0010200102
Dec00543564621
Total4569246589887914445