*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013233
Feb00130821
Mar01216800180
Apr414356600713
May204014943004977
Jun532501220580027123
Jul313496646004173
Aug101934400373
Sep0428500289
Oct0013600136
Nov00150015
Dec0090197206
Total118327005183123738239