Frequencies for first 10,000 rows of ager variable in namcs2010 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      2,976       29.76       29.76
      15-24 years |        825        8.25       38.01
      25-44 years |      1,821       18.21       56.22
      45-64 years |      2,513       25.13       81.35
      65-74 years |        925        9.25       90.60
75 years and over |        940        9.40      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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