Frequencies for first 10,000 rows of ager variable in nhamcsed2012 dataset :

       Age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,665       16.65       16.65
      15-24 years |      1,653       16.53       33.18
      25-44 years |      2,833       28.33       61.51
      45-64 years |      2,246       22.46       83.97
      65-74 years |        665        6.65       90.62
75 years and over |        938        9.38      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016