*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002424
Feb004026
Mar00760076
Apr511070001076
May2472177002208
Jun5532642002700
Jul1821752001772
Aug601152001158
Sep1065600657
Oct0020700207
Nov00570057
Dec001204860
Total10913980507410001