*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0008128136
Feb002815180
Mar0644700111
Apr33580064
May9962114001085
Jun112278398002687
Jul31234465001702
Aug11426400279
Sep0219800200
Oct00850085
Nov00590059
Dec00442504550
Total2745571760116837038