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

    total # of |
   medications |
from formulary |
          list |      Freq.     Percent        Cum.
---------------+-----------------------------------
       0 drugs |        705        7.05        7.05
        1 drug |        852        8.52       15.57
       2 drugs |        413        4.13       19.70
       3 drugs |        241        2.41       22.11
       4 drugs |         90        0.90       23.01
       5 drugs |         47        0.47       23.48
       6 drugs |        121        1.21       24.69
Not applicable |      3,642       36.42       61.11
       Unknown |      3,889       38.89      100.00
---------------+-----------------------------------
         Total |     10,000      100.00

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