*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000000
Feb000000
Mar009009
Apr01843000448
May147775535008324
Jun106219138580022877
Jul7534962527006098
Aug6211683001710
Sep241160001166
Oct00520052
Nov002002
Dec001034
Total2033322772570340690