*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00026668
Feb001701532
Mar015690084
Apr04314600189
May26443100677
Jun11218968002268
Jul61097645001748
Aug61113700154
Sep00920092
Oct00900090
Nov00660066
Dec00340209243
Total253999139522905711