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

      ROUTE |
    SIGNING |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,167       11.67       11.67
          2 |      1,455       14.55       26.22
          3 |      2,574       25.74       51.96
          4 |      1,798       17.98       69.94
          5 |         28        0.28       70.22
          6 |      2,875       28.75       98.97
          7 |         20        0.20       99.17
          8 |         69        0.69       99.86
          9 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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