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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        342        3.42        3.42
          1 |          2        0.02        3.44
          2 |          9        0.09        3.53
          3 |          7        0.07        3.60
          4 |          4        0.04        3.64
          5 |         75        0.75        4.39
          6 |          2        0.02        4.41
          7 |          9        0.09        4.50
          8 |         15        0.15        4.65
          9 |          4        0.04        4.69
         10 |         83        0.83        5.52
         11 |          1        0.01        5.53
         12 |          8        0.08        5.61
         13 |         15        0.15        5.76
         14 |          5        0.05        5.81
         15 |         66        0.66        6.47
         16 |          6        0.06        6.53
         17 |         10        0.10        6.63
         18 |         13        0.13        6.76
         19 |          5        0.05        6.81
         20 |         62        0.62        7.43
         21 |          5        0.05        7.48
         22 |          5        0.05        7.53
         23 |         22        0.22        7.75
         24 |          9        0.09        7.84
         25 |         85        0.85        8.69
         26 |          5        0.05        8.74
         27 |         10        0.10        8.84
         28 |         33        0.33        9.17
         29 |          6        0.06        9.23
         30 |        103        1.03       10.26
         31 |          6        0.06       10.32
         32 |         15        0.15       10.47
         33 |         39        0.39       10.86
         34 |          7        0.07       10.93
         35 |        177        1.77       12.70
         36 |         17        0.17       12.87
         37 |         12        0.12       12.99
         38 |         53        0.53       13.52
         39 |          8        0.08       13.60
         40 |        227        2.27       15.87
         41 |         14        0.14       16.01
         42 |         10        0.10       16.11
         43 |         63        0.63       16.74
         44 |          5        0.05       16.79
         45 |        334        3.34       20.13
         46 |          8        0.08       20.21
         47 |         11        0.11       20.32
         48 |         71        0.71       21.03
         49 |         18        0.18       21.21
         50 |        313        3.13       24.34
         51 |          8        0.08       24.42
         52 |         18        0.18       24.60
         53 |         88        0.88       25.48
         54 |         11        0.11       25.59
         55 |        610        6.10       31.69
         56 |          8        0.08       31.77
         57 |         12        0.12       31.89
         58 |         82        0.82       32.71
         59 |          9        0.09       32.80
         60 |        300        3.00       35.80
         61 |          8        0.08       35.88
         62 |         16        0.16       36.04
         63 |         56        0.56       36.60
         64 |          8        0.08       36.68
         65 |        495        4.95       41.63
         66 |          7        0.07       41.70
         67 |         17        0.17       41.87
         68 |         74        0.74       42.61
         69 |         12        0.12       42.73
         70 |        310        3.10       45.83
         71 |          9        0.09       45.92
         72 |          8        0.08       46.00
         73 |         46        0.46       46.46
         74 |          3        0.03       46.49
         75 |        131        1.31       47.80
         76 |          2        0.02       47.82
         77 |          8        0.08       47.90
         78 |         29        0.29       48.19
         79 |          7        0.07       48.26
         80 |        117        1.17       49.43
         81 |          3        0.03       49.46
         82 |          2        0.02       49.48
         83 |         14        0.14       49.62
         85 |         46        0.46       50.08
         86 |          3        0.03       50.11
         87 |          5        0.05       50.16
         88 |         14        0.14       50.30
         89 |          4        0.04       50.34
         90 |         62        0.62       50.96
         91 |          3        0.03       50.99
         92 |          2        0.02       51.01
         93 |          4        0.04       51.05
         95 |         20        0.20       51.25
         96 |          1        0.01       51.26
         97 |         89        0.89       52.15
         98 |      2,943       29.43       81.58
         99 |      1,842       18.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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