Frequencies for first 10,000 rows of ager variable in namcs1995 dataset :

      patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,111       11.11       11.11
      15-24 years |        852        8.52       19.63
      25-44 years |      2,716       27.16       46.79
      45-64 years |      2,590       25.90       72.69
      65-74 years |      1,460       14.60       87.29
75 years and over |      1,271       12.71      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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