Frequencies for first 10,000 rows of age_grp variable in demo2018q4 dataset :

  Age Group |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,068       80.68       80.68
          A |      1,023       10.23       90.91
          C |         31        0.31       91.22
          E |        813        8.13       99.35
          I |         12        0.12       99.47
          N |         24        0.24       99.71
          T |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Mar 2019