Frequencies for first 10,000 rows of prov0560 variable in pos2005 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,314       83.14       83.14
          N |      1,166       11.66       94.80
          Y |        520        5.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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