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

   were any medications |
 from a formulary list? |      Freq.     Percent        Cum.
------------------------+-----------------------------------
                     No |        622        6.22        6.22
                    Yes |      1,930       19.30       25.52
                Unknown |      4,130       41.30       66.82
N/A (no drug mentioned) |      3,318       33.18      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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