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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,941       59.41       59.41
          1 |      2,992       29.92       89.33
          2 |        100        1.00       90.33
          3 |         18        0.18       90.51
          4 |        283        2.83       93.34
          7 |          6        0.06       93.40
          8 |         16        0.16       93.56
         10 |         61        0.61       94.17
         99 |        583        5.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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