*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0006150156
Feb00103384190
Mar0015200152
Apr0415200156
May04190023
Jun242230067
Jul151720000232
Aug529700104
Sep00350035
Oct0016000160
Nov0019700197
Dec00510256307
Total2269118994901779