Frequencies for first 10,000 rows of contsub6 variable in namcs2003 dataset :

 controlled |
status code |
        for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          6        0.06        0.06
          3 |          6        0.06        0.12
          4 |         32        0.32        0.44
          6 |        680        6.80        7.24
          7 |         15        0.15        7.39
          . |      9,261       92.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016