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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,536       55.36       55.36
          1 |      3,459       34.59       89.95
          2 |        173        1.73       91.68
          3 |         20        0.20       91.88
          4 |         24        0.24       92.12
          5 |          6        0.06       92.18
          6 |          1        0.01       92.19
          7 |          5        0.05       92.24
          8 |         25        0.25       92.49
          9 |        751        7.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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