*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0007233240
Feb002405074
Mar04520056
Apr225669900957
May102559561003130
Jun1431162396005526
Jul111371175001323
Aug4245700463
Sep1427800283
Oct0125800259
Nov00680068
Dec00423534579
Total42607960101081712958