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

      ROUTE |
    SIGNING |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,403       14.03       14.03
          2 |      1,541       15.41       29.44
          3 |      2,517       25.17       54.61
          4 |      1,794       17.94       72.55
          5 |         86        0.86       73.41
          6 |      2,115       21.15       94.56
          7 |          7        0.07       94.63
          8 |        509        5.09       99.72
          9 |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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