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

    alcohol |
      test- |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,497       54.97       54.97
          1 |          4        0.04       55.01
          2 |      4,399       43.99       99.00
          8 |          2        0.02       99.02
          9 |         98        0.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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