*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00005858
Feb035302985
Mar9151681020015279
Apr035054100891
May298928000398
Jun1593240300594
Jul1071724900373
Aug31524100277
Sep8213100141
Oct1010300104
Nov00810081
Dec002913868
Total344156662213112518349