*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001522152230
Feb0290838551768
Mar261558001566
Apr6221424001452
May183135257003410
Jun504306297004653
Jul283732160002561
Aug9101641001660
Sep2395400959
Oct0078300783
Nov0170500706
Dec00530221312663
Total11578581121720520124411