Frequencies for first 10,000 rows of hha_qlfyd_opt_spch_sw variable in pos2010 dataset :

        HHA |
  QUALIFIED |
    FOR OPT |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,318       83.18       83.18
          N |      1,229       12.29       95.47
          Y |        453        4.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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