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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,859       58.59       58.59
          1 |      2,778       27.78       86.37
          2 |        101        1.01       87.38
          3 |         15        0.15       87.53
          4 |         17        0.17       87.70
          5 |          9        0.09       87.79
          6 |          2        0.02       87.81
          8 |          6        0.06       87.87
         10 |         55        0.55       88.42
         99 |      1,158       11.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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