*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0006151157
Feb00104384191
Mar0015600156
Apr0415600160
May04190023
Jun242230067
Jul161820700241
Aug7210100110
Sep00350035
Oct0016000160
Nov0019800198
Dec00510256307
Total2570121094911805