Frequencies for first 10,000 rows of ager variable in nhamcsopd2001 dataset :

 age recode |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      2,251       22.51       22.51
          2 |      1,198       11.98       34.49
          3 |      2,719       27.19       61.68
          4 |      2,568       25.68       87.36
          5 |        789        7.89       95.25
          6 |        475        4.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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