*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003434
Feb001901130
Mar02422700251
Apr11521800234
May65674000613
Jun9279770002876
Jul71297502001806
Aug8111800127
Sep00830083
Oct01710072
Nov00350035
Dec00806371
Total314702139101086232