Frequencies for first 10,000 rows of ager variable in nhamcsopd1995 dataset :

      patient age |
           recode |      Freq.     Percent        Cum.
------------------+-----------------------------------
   Under 15 years |      1,833       18.33       18.33
      15-24 years |      1,327       13.27       31.60
      25-44 years |      3,169       31.69       63.29
      45-64 years |      2,200       22.00       85.29
      65-74 years |        857        8.57       93.86
75 years and over |        614        6.14      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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