Frequencies for first 10,000 rows of ager variable in namcs1996 dataset :

      patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,458       14.58       14.58
      15-24 years |        706        7.06       21.64
      25-44 years |      2,370       23.70       45.34
      45-64 years |      2,554       25.54       70.88
      65-74 years |      1,505       15.05       85.93
75 years and over |      1,407       14.07      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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