*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013233
Feb00130821
Mar01216800180
Apr414356600713
May204105943005068
Jun542502120590027134
Jul313496646004173
Aug101934400373
Sep0428600290
Oct0013600136
Nov00150015
Dec00120194206
Total119328005188123438342