Frequencies for first 10,000 rows of ager variable in nhamcsopd2003 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      1,989       19.89       19.89
      15-24 years |      1,383       13.83       33.72
      25-44 years |      2,603       26.03       59.75
      45-64 years |      2,526       25.26       85.01
      65-74 years |        809        8.09       93.10
75 years and over |        690        6.90      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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