Frequencies for first 10,000 rows of vspd_lim variable in vehicle dataset :

speed limit |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         87        0.87        0.87
          5 |          3        0.03        0.90
         10 |          5        0.05        0.95
         15 |         22        0.22        1.17
         20 |         16        0.16        1.33
         25 |        541        5.41        6.74
         30 |        357        3.57       10.31
         35 |      1,118       11.18       21.49
         40 |        966        9.66       31.15
         45 |      1,617       16.17       47.32
         50 |        491        4.91       52.23
         55 |      2,287       22.87       75.10
         60 |        196        1.96       77.06
         65 |      1,440       14.40       91.46
         70 |        466        4.66       96.12
         75 |        130        1.30       97.42
         98 |        164        1.64       99.06
         99 |         94        0.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016