*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013917930
Feb013704382757
Mar2221546001570
Apr3402261002304
May166403145006564
Jun79198102340020123
Jul55864325030011201
Aug29211316001366
Sep151486001492
Oct011337001338
Nov0057200572
Dec0124719531202
Total185349471201718225249419