*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004351355
Feb00115095210
Mar7673300746
Apr2231956001981
May11861311001408
Jun188885800964
Jul30922600265
Aug6735600369
Sep0145400455
Oct0050100501
Nov0022500225
Dec00761514591
Total74220681159608070