*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00005656
Feb035202984
Mar0339300126
Apr029953800837
May298927200390
Jun1543239500581
Jul1081724800373
Aug26624100273
Sep8213000140
Oct1010200103
Nov00810081
Dec002913868
Total326481218111233112