*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00015103118
Feb002803361
Mar02360038
Apr1114640089
May886211300263
Jun19215021900561
Jul18319325600632
Aug444414200230
Sep4211400120
Oct00860086
Nov01480049
Dec00475363415
Total5224681153204992662