Frequencies for first 10,000 rows of ager variable in nhamcsopd2005 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      2,268       22.68       22.68
      15-24 years |      1,354       13.54       36.22
      25-44 years |      2,550       25.50       61.72
      45-64 years |      2,468       24.68       86.40
      65-74 years |        781        7.81       94.21
75 years and over |        579        5.79      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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