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

  method of |
       drug |
determinati |
      on by |
     police |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        439        4.39        4.39
          2 |        164        1.64        6.03
          3 |        109        1.09        7.12
          7 |         37        0.37        7.49
          8 |      9,251       92.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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