*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003385388
Feb101330111245
Mar1035900360
Apr161664001671
May191242321002464
Jun1461641437001747
Jul961770300816
Aug24665600686
Sep0267800680
Oct1189900901
Nov0053500535
Dec001210490611
Total2893209506398611104