*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000238238
Feb0080081161
Mar211188001191
Apr261498001506
May1582097002120
Jun80363144003260
Jul1461601001621
Aug311076001080
Sep2093500937
Oct0088600886
Nov0048400484
Dec00910277368
Total1185813080059613852