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

  method of |
       drug |
determinati |
      on by |
     police |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        498        4.98        4.98
          2 |        168        1.68        6.66
          3 |        106        1.06        7.72
          7 |         68        0.68        8.40
          8 |      9,160       91.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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