Frequencies for first 10,000 rows of rx7v1c3 variable in namcs2013 dataset :

   For RX7, |
 level 1 of |
MULTUM drug |
category #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,986       99.86       99.86
        040 |          1        0.01       99.87
        057 |         11        0.11       99.98
        105 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017