*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003682685
Feb032460242491
Mar0863700645
Apr1401808001849
May5511345001401
Jun463166400741
Jul38326300304
Aug6022700233
Sep2027900281
Oct0065100651
Nov0062600626
Dec001850760945
Total981366931316848852