*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00014510524
Feb101952192390
Mar0341300416
Apr1429100296
May5643800449
Jun61126600283
Jul6118500192
Aug5222200229
Sep0240400406
Oct0181300814
Nov1040700408
Dec001550542697
Total253037891612445104