Frequencies for first 10,000 rows of ager variable in namcs2007 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      2,514       25.14       25.14
      15-24 years |        889        8.89       34.03
      25-44 years |      1,873       18.73       52.76
      45-64 years |      2,591       25.91       78.67
      65-74 years |      1,040       10.40       89.07
75 years and over |      1,093       10.93      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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