*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001318319
Feb0093095188
Mar7552600538
Apr1211733001755
May9851273001367
Jun178884300948
Jul30921400253
Aug6732900342
Sep0141200413
Oct0047100471
Nov0021500215
Dec00761514591
Total70216618529277400