Frequencies for first 10,000 rows of ager variable in nhamcsopd1996 dataset :

      patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,680       16.80       16.80
      15-24 years |      1,311       13.11       29.91
      25-44 years |      3,145       31.45       61.36
      45-64 years |      2,332       23.32       84.68
      65-74 years |        920        9.20       93.88
75 years and over |        612        6.12      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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