Frequencies for first 10,000 rows of prov0560 variable in pos2004 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,384       83.84       83.84
          N |      1,123       11.23       95.07
          Y |        493        4.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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