Frequencies for fuzz variable in fpreva1998 dataset :

 fuzz value |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.28        0.28
   1.00e-12 |        702       99.72      100.00
------------+-----------------------------------
      Total |        704      100.00

by Jean Roth , jroth@nber.org , 10 May 2016