*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003260263
Feb13690116189
Mar02412700151
Apr1218400106
May4610000110
Jun52112000146
Jul55570067
Aug24480054
Sep11790081
Oct1113200134
Nov1013000131
Dec00720306378
Total2186101836821810