*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001616
Feb004037
Mar02190021
Apr1531065001119
May08469214008683
Jun7192492370019493
Jul3140771835005943
Aug23767100701
Sep121551001554
Oct0076900769
Nov01330034
Dec01906777
Total6331861640708638417