Frequencies for first 10,000 rows of ager variable in nhamcsed2007 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   under 15 years |      1,581       15.81       15.81
      15-24 years |      1,618       16.18       31.99
      25-44 years |      3,067       30.67       62.66
      45-64 years |      2,239       22.39       85.05
      65-74 years |        583        5.83       90.88
75 years and over |        912        9.12      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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