*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001010
Feb000011
Mar20110013
Apr5265600663
May5331437001475
Jun131741040001245
Jul722047400566
Aug12352200537
Sep4045900463
Oct1146200464
Nov0016200162
Dec001605167
Total23213352390625666