*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004531213166
Feb011189413042498
Mar2182129002149
Apr0412165002206
May132655275002943
Jun561776432002264
Jul991291544001772
Aug2031937001960
Sep002014002014
Oct011731001732
Nov102163002164
Dec001015323413359
Total19146241659452676628227