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

  drug test |
    -status |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,682       56.82       56.82
          1 |          2        0.02       56.84
          2 |      2,950       29.50       86.34
          8 |      1,286       12.86       99.20
          9 |         80        0.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016