Frequencies for atst_typ variable in person dataset :

    ALCOHOL |
  TEST TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        590       46.02       46.02
          1 |        490       38.22       84.24
          2 |        202       15.76      100.00
------------+-----------------------------------
      Total |      1,282      100.00

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