Frequencies for first 10,000 rows of ager variable in namcs2013 dataset :

      Patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,608       16.08       16.08
      15-24 years |        695        6.95       23.03
      25-44 years |      1,915       19.15       42.18
      45-64 years |      2,843       28.43       70.61
      65-74 years |      1,538       15.38       85.99
75 years and over |      1,401       14.01      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017