Frequencies for first 10,000 rows of alc_status variable in person dataset :

    alcohol |
      test- |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,484       54.84       54.84
          1 |          9        0.09       54.93
          2 |      4,397       43.97       98.90
          8 |          2        0.02       98.92
          9 |        108        1.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016