Frequencies for first 10,000 rows of prov0560 variable in pos1993 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,870       88.70       88.70
          N |        952        9.52       98.22
          Y |        178        1.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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