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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,679       56.79       56.79
          1 |      3,903       39.03       95.82
          2 |         63        0.63       96.45
          3 |         25        0.25       96.70
          4 |         23        0.23       96.93
          5 |          7        0.07       97.00
          7 |          4        0.04       97.04
          8 |         10        0.10       97.14
         10 |        193        1.93       99.07
         99 |         93        0.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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