*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00012129141
Feb012502147
Mar01370038
Apr1511400120
May410324100348
Jun512444500574
Jul44823200284
Aug61328300302
Sep2723100240
Oct12730076
Nov00540155
Dec00511643695
Total233041786137942920