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

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,549       55.49       55.49
          1 |      3,952       39.52       95.01
          2 |         54        0.54       95.55
          3 |         45        0.45       96.00
          4 |         35        0.35       96.35
          5 |          5        0.05       96.40
          6 |          1        0.01       96.41
          7 |          3        0.03       96.44
          8 |          7        0.07       96.51
         10 |        224        2.24       98.75
         98 |         26        0.26       99.01
         99 |         99        0.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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