*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005503508
Feb1421422170357
Mar015922700386
Apr021530300518
May111261250001522
Jun181843318002179
Jul12668461001141
Aug59533400434
Sep29234900443
Oct07323200305
Nov05318500238
Dec012770527616
Total4945132878712008647