*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0012418641889
Feb58714167391482
Mar92541818001964
Apr3351171474001926
May283961543001922
Jun2981561785002239
Jul253881943002284
Aug25211083001129
Sep1451119001138
Oct301075001078
Nov1055400555
Dec00465214011868
Total13095451357442400419474