Frequencies for first 10,000 rows of prov0560 variable in pos2008 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,105       81.05       81.05
          N |      1,339       13.39       94.44
          Y |        556        5.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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