*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011314
Feb004015
Mar03140017
Apr1365881001247
May17910220008131
Jun9176992790017987
Jul3035721766005368
Aug18851700543
Sep251225001232
Oct0057000570
Nov01200021
Dec01706169
Total6129564550317535204