Frequencies for first 10,000 rows of ager variable in nhamcsed1995 dataset :

      patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      2,387       23.87       23.87
      15-24 years |      1,506       15.06       38.93
      25-44 years |      3,223       32.23       71.16
      45-64 years |      1,505       15.05       86.21
      65-74 years |        586        5.86       92.07
75 years and over |        793        7.93      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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