*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00017274291
Feb0089370162
Mar1242230002255
Apr10954206004311
May685801846006715
Jun14155522838008531
Jul913583555004004
Aug14163150003180
Sep242117002123
Oct1079100792
Nov0027700277
Dec0012215584721
Total32811850202213592833362