Frequencies for first 10,000 rows of form4 variable in namcs1998 dataset :

         is |
 medication |
  #4 from a |
  formulary |
      list? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        189        1.89        1.89
          1 |        164        1.64        3.53
          2 |        671        6.71       10.24
          3 |      8,976       89.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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