Frequencies for first 10,000 rows of ager variable in namcs2004 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,281       12.81       12.81
      15-24 years |        738        7.38       20.19
      25-44 years |      2,150       21.50       41.69
      45-64 years |      3,023       30.23       71.92
      65-74 years |      1,282       12.82       84.74
75 years and over |      1,526       15.26      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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