Frequencies for first 10,000 rows of prov0560 variable in pos2007 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,195       81.95       81.95
          N |      1,279       12.79       94.74
          Y |        526        5.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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