*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002325982621
Feb2394759041861
Mar6302994003030
Apr171184635004770
May1073216909007337
Jun2694445989006702
Jul264421816002122
Aug54101619001683
Sep891392001409
Oct011398001399
Nov011153001154
Dec00517520042526
Total7279792936933550636614