Frequencies for first 10,000 rows of prov0560 variable in pos1998 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,591       85.91       85.91
          N |      1,096       10.96       96.87
          Y |        313        3.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016