Frequencies for first 10,000 rows of ager variable in namcs2012 dataset :

      Patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,606       16.06       16.06
      15-24 years |        758        7.58       23.64
      25-44 years |      2,049       20.49       44.13
      45-64 years |      2,919       29.19       73.32
      65-74 years |      1,381       13.81       87.13
75 years and over |      1,287       12.87      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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