*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004825829
Feb002471282530
Mar11237900392
Apr251637100412
May723443200538
Jun1667162000857
Jul1043474300881
Aug41074400758
Sep1057500576
Oct0037700377
Nov0039000390
Dec0026138871151
Total3731775139819947691