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

  method of |
       drug |
determinati |
      on by |
     police |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        481        4.81        4.81
          2 |        149        1.49        6.30
          3 |        175        1.75        8.05
          7 |         44        0.44        8.49
          8 |      9,151       91.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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