Frequencies for first 10,000 rows of fed_aid variable in accident dataset :

    fed_aid |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,122       11.22       11.22
          2 |      2,962       29.62       40.84
          3 |      2,456       24.56       65.40
          4 |      1,030       10.30       75.70
          5 |      2,421       24.21       99.91
          9 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016