*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00020603623
Feb001760208384
Mar01726200279
Apr010238500487
May03060363003423
Jun45433593006030
Jul76842597003288
Aug15551702001772
Sep8393500946
Oct2032700329
Nov0028400284
Dec001340779913
Total369354775820159018758