*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004580584
Feb002100211421
Mar1238600389
Apr11435500370
May76216900697
Jun131065104001182
Jul1423553800787
Aug0443900443
Sep0038100381
Oct0026200262
Nov0021200212
Dec001140787901
Total3619413070415786629