Frequencies for first 10,000 rows of ager variable in nhamcsed2000 dataset :

      patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      2,081       20.81       20.81
      15-24 years |      1,557       15.57       36.38
      25-44 years |      3,264       32.64       69.02
      45-64 years |      1,797       17.97       86.99
      65-74 years |        549        5.49       92.48
75 years and over |        752        7.52      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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