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

    fed_aid |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,089       10.89       10.89
          2 |      3,056       30.56       41.45
          3 |      2,349       23.49       64.94
          4 |      1,013       10.13       75.07
          5 |      2,427       24.27       99.34
          9 |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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