Frequencies for first 10,000 rows of form6 variable in namcs1997 dataset :

         is |
 medication |
  #6 from a |
  formulary |
      list? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        127        1.27        1.27
          1 |         74        0.74        2.01
          2 |        370        3.70        5.71
          3 |      9,429       94.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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