Frequencies for first 10,000 rows of ager variable in nhamcsopd2006 dataset :

       age recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      2,205       22.05       22.05
      15-24 years |      1,186       11.86       33.91
      25-44 years |      2,606       26.06       59.97
      45-64 years |      2,506       25.06       85.03
      65-74 years |        784        7.84       92.87
75 years and over |        713        7.13      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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