*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000033
Feb00250328
Mar111311395001537
Apr263532005002384
May1083305366003779
Jun1866179425006790
Jul1198901808002817
Aug261279600834
Sep3285100856
Oct0033800338
Nov00120012
Dec000099
Total47910872802101519387