Frequencies for first 10,000 rows of prescr4 variable in namcs2000 dataset :

prescriptio |
   n status |
   code for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,026       10.26       10.26
          2 |        112        1.12       11.38
          3 |         92        0.92       12.30
          . |      8,770       87.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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