*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000237237
Feb0086081167
Mar211199001202
Apr261517001525
May1582112002135
Jun80363146003262
Jul1461614001634
Aug311099001103
Sep2095200954
Oct0090700907
Nov0050000500
Dec00930277370
Total1185813225059513996