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

  Method of |
       Drug |
determinati |
      on by |
     police |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        258        2.58        2.58
          2 |        134        1.34        3.92
          3 |         48        0.48        4.40
          7 |         59        0.59        4.99
          8 |      9,501       95.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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