*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001111
Feb000011
Mar20130015
Apr5470400713
May8331318001359
Jun13775924001136
Jul712042500516
Aug14343400451
Sep3139000394
Oct1141900421
Nov0013400134
Dec001304760
Total24113747740595211