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

Speed Limit |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         30        0.30        0.30
          5 |          1        0.01        0.31
         10 |          7        0.07        0.38
         15 |         19        0.19        0.57
         20 |         10        0.10        0.67
         25 |        551        5.51        6.18
         30 |        457        4.57       10.75
         35 |      1,083       10.83       21.58
         40 |        944        9.44       31.02
         45 |      1,578       15.78       46.80
         50 |        510        5.10       51.90
         55 |      2,316       23.16       75.06
         60 |        184        1.84       76.90
         65 |      1,393       13.93       90.83
         70 |        520        5.20       96.03
         75 |        168        1.68       97.71
         98 |         61        0.61       98.32
         99 |        168        1.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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