*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0015686692
Feb012161301519
Mar3854000551
Apr6759200605
May68011178001985
Jun1743753116007508
Jul1224972547005056
Aug6161175001197
Sep3456200569
Oct4042500429
Nov0032100321
Dec001300658788
Total577709108036164520220