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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,775       57.75       57.75
          1 |      3,166       31.66       89.41
          2 |        156        1.56       90.97
          3 |         16        0.16       91.13
          4 |         28        0.28       91.41
          5 |         19        0.19       91.60
          6 |          2        0.02       91.62
          7 |          3        0.03       91.65
          8 |         15        0.15       91.80
          9 |        820        8.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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