Frequencies for first 10,000 rows of ager variable in nhamcsopd2008 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      2,325       23.25       23.25
      15-24 years |      1,123       11.23       34.48
      25-44 years |      2,346       23.46       57.94
      45-64 years |      2,555       25.55       83.49
      65-74 years |        815        8.15       91.64
75 years and over |        836        8.36      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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