*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001111
Feb000011
Mar20130015
Apr5469400703
May8341308001350
Jun13774923001134
Jul702042300513
Aug14343400451
Sep3139000394
Oct1141700419
Nov0013400134
Dec001304760
Total24013747490595185