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

      Route |
    Signing |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,259       12.59       12.59
          2 |      1,229       12.29       24.88
          3 |      2,624       26.24       51.12
          4 |      1,860       18.60       69.72
          5 |         19        0.19       69.91
          6 |      2,926       29.26       99.17
          8 |         79        0.79       99.96
          9 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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