*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00023436
Feb002501136
Mar03522500260
Apr12518400210
May65903900635
Jun9275372002834
Jul81226528001762
Aug5210700114
Sep00710071
Oct01500051
Nov00300030
Dec00706269
Total294632133821076108