*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00023335
Feb002001131
Mar03520600241
Apr12518400210
May55903400629
Jun7275370002830
Jul81226523001757
Aug5210400111
Sep00700070
Oct01500051
Nov00270027
Dec00706269
Total264632129521066061