*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001521992214
Feb0281838501673
Mar261531001539
Apr6241421001451
May183123267003408
Jun504296297004643
Jul283702140002538
Aug9101621001640
Sep2393400939
Oct0077400774
Nov0167600677
Dec00518221302650
Total11578351099720517924146