*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00014793807
Feb15312701262579
Mar12815358900870
Apr17226954600987
May19253896001141
Jun11997935001151
Jul593659900694
Aug151550900539
Sep71358300603
Oct2238700391
Nov1132300325
Dec0119729171117
Total71067158341719729204