*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002424
Feb004026
Mar00750075
Apr511070001076
May2472177002208
Jun5532639002697
Jul1821750001770
Aug601151001157
Sep1065600657
Oct0020700207
Nov00570057
Dec001204860
Total1091397980749994