*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001521992214
Feb0281838501673
Mar261532001540
Apr6241423001453
May183123267003408
Jun504296297004643
Jul283702140002538
Aug9101622001641
Sep2393400939
Oct0077400774
Nov0167600677
Dec00518221302650
Total11578351100120517924150