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

      Route |
    Signing |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,333       13.33       13.33
          2 |      1,293       12.93       26.26
          3 |      2,762       27.62       53.88
          4 |      2,027       20.27       74.15
          5 |         48        0.48       74.63
          6 |      2,374       23.74       98.37
          7 |         18        0.18       98.55
          8 |         58        0.58       99.13
          9 |         87        0.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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