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

      Route |
    Signing |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,197       11.97       11.97
          2 |      1,243       12.43       24.40
          3 |      2,573       25.73       50.13
          4 |      1,994       19.94       70.07
          5 |         25        0.25       70.32
          6 |      2,877       28.77       99.09
          8 |         85        0.85       99.94
          9 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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