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

    Alcohol |
      Test- |
     Status |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,503       55.03       55.03
          1 |         11        0.11       55.14
          2 |      3,943       39.43       94.57
          8 |        520        5.20       99.77
          9 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016