*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004213217
Feb0068366137
Mar0112900130
Apr0729500302
May42439242002685
Jun72816268003091
Jul25482728001235
Aug94646300563
Sep1133400336
Oct0020600206
Nov0010500105
Dec00631581645
Total1315752290188609652