*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00068389
Feb013133368
Mar02480050
Apr12116800190
May114123000282
Jun135125000314
Jul35136100109
Aug4468500135
Sep2868500119
Oct92850096
Nov12540057
Dec00291250280
Total1421451126103661789