Frequencies for v2 variable in busrules2015 dataset :

         v2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        365        3.58        3.58
          2 |      1,430       14.03       17.61
          3 |      1,326       13.01       30.62
          4 |      2,044       20.05       50.67
          5 |      1,835       18.00       68.67
          6 |      1,258       12.34       81.02
          7 |        590        5.79       86.80
          8 |        450        4.41       91.22
          9 |        276        2.71       93.93
         10 |        233        2.29       96.21
         11 |        161        1.58       97.79
         12 |         71        0.70       98.49
         13 |         35        0.34       98.83
         15 |        119        1.17      100.00
------------+-----------------------------------
      Total |     10,193      100.00

by Jean Roth , jroth@nber.org , 6 Oct 2016