*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001033783388
Feb27923511622099
Mar70642742002876
Apr239804055004374
May2421015415005758
Jun2353757153007763
Jul1261674681004974
Aug27203343003390
Sep6103295003311
Oct212015002018
Nov101272001273
Dec108301022723113
Total9518253572425681244337