Frequencies for first 10,000 rows of form2 variable in namcs1997 dataset :

         is |
 medication |
  #2 from a |
  formulary |
      list? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,140       11.40       11.40
          1 |      1,159       11.59       22.99
          2 |      3,491       34.91       57.90
          3 |      4,210       42.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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