Frequencies for first 10,000 rows of hha_qlfyd_opt_spch_sw variable in pos1994 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,780       87.80       87.80
          N |      1,008       10.08       97.88
          Y |        212        2.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017