*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004398402
Feb001194159282
Mar03726700304
Apr744948200938
May1245531900786
Jun4252640900977
Jul456625900370
Aug14933000353
Sep3337600382
Oct0534000345
Nov0233500337
Dec001070532639
Total12315523343810896115