Frequencies for first 10,000 rows of ager variable in nhamcsed2011 dataset :

       Age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,677       16.77       16.77
      15-24 years |      1,584       15.84       32.61
      25-44 years |      2,886       28.86       61.47
      45-64 years |      2,221       22.21       83.68
      65-74 years |        670        6.70       90.38
75 years and over |        962        9.62      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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