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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        377        3.77        3.77
          1 |          5        0.05        3.82
          2 |          2        0.02        3.84
          3 |          9        0.09        3.93
          4 |          5        0.05        3.98
          5 |         74        0.74        4.72
          6 |          3        0.03        4.75
          7 |          4        0.04        4.79
          8 |         32        0.32        5.11
         10 |         90        0.90        6.01
         11 |          2        0.02        6.03
         12 |         12        0.12        6.15
         13 |         20        0.20        6.35
         14 |          2        0.02        6.37
         15 |         68        0.68        7.05
         16 |          3        0.03        7.08
         17 |          6        0.06        7.14
         18 |         15        0.15        7.29
         19 |          4        0.04        7.33
         20 |         56        0.56        7.89
         21 |          4        0.04        7.93
         22 |          5        0.05        7.98
         23 |         15        0.15        8.13
         24 |          2        0.02        8.15
         25 |         78        0.78        8.93
         26 |          8        0.08        9.01
         27 |          6        0.06        9.07
         28 |         30        0.30        9.37
         29 |          5        0.05        9.42
         30 |        113        1.13       10.55
         31 |          3        0.03       10.58
         32 |          8        0.08       10.66
         33 |         46        0.46       11.12
         34 |          5        0.05       11.17
         35 |        186        1.86       13.03
         36 |          9        0.09       13.12
         37 |          7        0.07       13.19
         38 |         71        0.71       13.90
         39 |          7        0.07       13.97
         40 |        259        2.59       16.56
         41 |          9        0.09       16.65
         42 |         13        0.13       16.78
         43 |         87        0.87       17.65
         44 |         12        0.12       17.77
         45 |        364        3.64       21.41
         46 |         10        0.10       21.51
         47 |          8        0.08       21.59
         48 |         66        0.66       22.25
         49 |         16        0.16       22.41
         50 |        323        3.23       25.64
         51 |          8        0.08       25.72
         52 |         17        0.17       25.89
         53 |         88        0.88       26.77
         54 |          7        0.07       26.84
         55 |        665        6.65       33.49
         56 |          7        0.07       33.56
         57 |         22        0.22       33.78
         58 |         89        0.89       34.67
         59 |          4        0.04       34.71
         60 |        286        2.86       37.57
         61 |         10        0.10       37.67
         62 |         15        0.15       37.82
         63 |         69        0.69       38.51
         64 |          6        0.06       38.57
         65 |        443        4.43       43.00
         66 |          5        0.05       43.05
         67 |         21        0.21       43.26
         68 |         85        0.85       44.11
         69 |          1        0.01       44.12
         70 |        342        3.42       47.54
         71 |          8        0.08       47.62
         72 |          8        0.08       47.70
         73 |         38        0.38       48.08
         74 |          8        0.08       48.16
         75 |        173        1.73       49.89
         76 |          5        0.05       49.94
         77 |          7        0.07       50.01
         78 |         22        0.22       50.23
         79 |          8        0.08       50.31
         80 |        137        1.37       51.68
         81 |          4        0.04       51.72
         82 |          7        0.07       51.79
         83 |         11        0.11       51.90
         84 |          6        0.06       51.96
         85 |         72        0.72       52.68
         86 |          4        0.04       52.72
         87 |          8        0.08       52.80
         88 |          9        0.09       52.89
         89 |          1        0.01       52.90
         90 |         61        0.61       53.51
         91 |          2        0.02       53.53
         92 |          2        0.02       53.55
         93 |          5        0.05       53.60
         94 |          3        0.03       53.63
         95 |         15        0.15       53.78
         96 |          3        0.03       53.81
         97 |         88        0.88       54.69
         98 |      3,118       31.18       85.87
         99 |      1,413       14.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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