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

  Drug Test |
    -Status |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      6,154       61.54       61.54
          1 |          7        0.07       61.61
          2 |      3,144       31.44       93.05
          8 |        668        6.68       99.73
          9 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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