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

      Route |
    Signing |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,267       12.67       12.67
          2 |      1,318       13.18       25.85
          3 |      2,431       24.31       50.16
          4 |      1,896       18.96       69.12
          5 |          8        0.08       69.20
          6 |      2,991       29.91       99.11
          8 |         86        0.86       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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