Frequencies for first 10,000 rows of hha_qlfyd_opt_spch_sw variable in pos1997 dataset :

        hha |
  qualified |
    for opt |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,629       86.29       86.29
          N |      1,068       10.68       96.97
          Y |        303        3.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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