Frequencies for first 10,000 rows of ager variable in namcs2006 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      2,433       24.33       24.33
      15-24 years |        896        8.96       33.29
      25-44 years |      1,964       19.64       52.93
      45-64 years |      2,644       26.44       79.37
      65-74 years |      1,022       10.22       89.59
75 years and over |      1,041       10.41      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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