*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00012695707
Feb121883206400
Mar01048700497
Apr23587600913
May16571131001204
Jun235885300934
Jul691344100523
Aug65637300444
Sep36635600398
Oct9233700348
Nov1223800241
Dec001201565686
Total22219154001614667295