*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00126467
Feb001301124
Mar1217300176
Apr62934200377
May28243843001114
Jun7212582837004167
Jul37342760001139
Aug81642200446
Sep2425400260
Oct00740074
Nov00330033
Dec00251479505
Total1541894577735548382