*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00020603623
Feb001770208385
Mar01726200279
Apr010338600489
May03060364003424
Jun45433598006035
Jul76842605003296
Aug15551708001778
Sep8393900950
Oct2032800330
Nov0028800288
Dec001350779914
Total369355779020159018791