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

Speed Limit |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         48        0.48        0.48
          5 |          5        0.05        0.53
         10 |          5        0.05        0.58
         15 |         22        0.22        0.80
         20 |         18        0.18        0.98
         25 |        501        5.01        5.99
         30 |        411        4.11       10.10
         35 |      1,077       10.77       20.87
         40 |        950        9.50       30.37
         45 |      1,675       16.75       47.12
         50 |        450        4.50       51.62
         55 |      2,347       23.47       75.09
         60 |        218        2.18       77.27
         65 |      1,379       13.79       91.06
         70 |        490        4.90       95.96
         75 |        164        1.64       97.60
         98 |        100        1.00       98.60
         99 |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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