Frequencies for first 10,000 rows of prescr6 variable in namcs2005 dataset :

prescriptio |
   n status |
   code for |
     med #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        898        8.98        8.98
          2 |        129        1.29       10.27
          3 |         73        0.73       11.00
          . |      8,900       89.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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