Frequencies for first 10,000 rows of form4 variable in namcs1999 dataset :

         is |
 medication |
  #4 from a |
  formulary |
      list? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        197        1.97        1.97
          1 |        277        2.77        4.74
          2 |        654        6.54       11.28
          3 |      8,872       88.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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