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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,929       59.29       59.29
          1 |      2,939       29.39       88.68
          2 |        150        1.50       90.18
          3 |         15        0.15       90.33
          4 |         15        0.15       90.48
          5 |          3        0.03       90.51
          6 |          1        0.01       90.52
          7 |          1        0.01       90.53
          8 |         41        0.41       90.94
          9 |        906        9.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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