Frequencies for first 10,000 rows of form4 variable in namcs2000 dataset :

         is |
 medication |
  #4 from a |
  formulary |
      list? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        196        1.96        1.96
          1 |        248        2.48        4.44
          2 |        788        7.88       12.32
          3 |      8,768       87.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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