*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan50100051
Feb180010028
Mar00022022
Apr00023225
May003154324481
Jun002055211541726
Jul0020423414857
Aug001638821425
Sep0132141219
Oct00037138
Nov00026026
Dec30000260326
Total368262187519174224