*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003434
Feb002301134
Mar02920700236
Apr11718500203
May65573900602
Jun9270470002783
Jul61226522001754
Aug5210500112
Sep00710071
Oct01500051
Nov00290029
Dec00706269
Total274536130801075978