*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005144149
Feb0150162114
Mar0410900113
Apr09800089
May13583300392
Jun106952800733
Jul317832900510
Aug1216800171
Sep1211200115
Oct01720073
Nov00610061
Dec00390266305
Total161250108164722825