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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,602       56.02       56.02
          1 |      3,382       33.82       89.84
          2 |        182        1.82       91.66
          3 |         16        0.16       91.82
          4 |         18        0.18       92.00
          5 |         14        0.14       92.14
          6 |          1        0.01       92.15
          7 |          2        0.02       92.17
          8 |         10        0.10       92.27
          9 |        773        7.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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