*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005141146
Feb0149161112
Mar0410700111
Apr08780086
May13573000388
Jun116942500730
Jul617831900503
Aug1216500168
Sep1211000113
Oct01710072
Nov00590059
Dec00380265303
Total201247105164672791