Frequencies for first 10,000 rows of ager variable in nhamcsopd2009 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      1,703       17.03       17.03
      15-24 years |      1,187       11.87       28.90
      25-44 years |      2,544       25.44       54.34
      45-64 years |      3,016       30.16       84.50
      65-74 years |        849        8.49       92.99
75 years and over |        701        7.01      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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