*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00005252
Feb035202984
Mar914091880014188
Apr033753700874
May278125700365
Jun1513134600528
Jul1021522700344
Aug31523700273
Sep8212800138
Oct10960097
Nov00710071
Dec002713765
Total329145652066111817079