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

     travel |
      speed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        397        3.97        3.97
          1 |          2        0.02        3.99
          2 |          5        0.05        4.04
          3 |          6        0.06        4.10
          4 |          4        0.04        4.14
          5 |         95        0.95        5.09
          6 |          1        0.01        5.10
          7 |          7        0.07        5.17
          8 |          9        0.09        5.26
         10 |        167        1.67        6.93
         11 |          5        0.05        6.98
         12 |          7        0.07        7.05
         13 |          9        0.09        7.14
         14 |          4        0.04        7.18
         15 |        112        1.12        8.30
         16 |          2        0.02        8.32
         17 |         11        0.11        8.43
         18 |         13        0.13        8.56
         19 |          5        0.05        8.61
         20 |         86        0.86        9.47
         21 |          6        0.06        9.53
         22 |          6        0.06        9.59
         23 |         10        0.10        9.69
         25 |         98        0.98       10.67
         26 |          7        0.07       10.74
         27 |          7        0.07       10.81
         28 |         23        0.23       11.04
         29 |          3        0.03       11.07
         30 |        182        1.82       12.89
         31 |          9        0.09       12.98
         32 |          8        0.08       13.06
         33 |         37        0.37       13.43
         34 |          8        0.08       13.51
         35 |        283        2.83       16.34
         36 |          5        0.05       16.39
         37 |         13        0.13       16.52
         38 |         33        0.33       16.85
         39 |         17        0.17       17.02
         40 |        358        3.58       20.60
         41 |          7        0.07       20.67
         42 |         18        0.18       20.85
         43 |         57        0.57       21.42
         44 |         11        0.11       21.53
         45 |        539        5.39       26.92
         46 |         11        0.11       27.03
         47 |         12        0.12       27.15
         48 |         24        0.24       27.39
         49 |         10        0.10       27.49
         50 |        412        4.12       31.61
         51 |         19        0.19       31.80
         52 |         16        0.16       31.96
         53 |         46        0.46       32.42
         54 |          4        0.04       32.46
         55 |        678        6.78       39.24
         56 |         11        0.11       39.35
         57 |         23        0.23       39.58
         58 |         53        0.53       40.11
         59 |         10        0.10       40.21
         60 |        353        3.53       43.74
         61 |          9        0.09       43.83
         62 |         16        0.16       43.99
         63 |         34        0.34       44.33
         64 |         11        0.11       44.44
         65 |        505        5.05       49.49
         66 |          6        0.06       49.55
         67 |          9        0.09       49.64
         68 |         47        0.47       50.11
         69 |         10        0.10       50.21
         70 |        326        3.26       53.47
         71 |          7        0.07       53.54
         72 |         11        0.11       53.65
         73 |         26        0.26       53.91
         74 |          4        0.04       53.95
         75 |        149        1.49       55.44
         76 |          9        0.09       55.53
         77 |          4        0.04       55.57
         78 |         12        0.12       55.69
         79 |          3        0.03       55.72
         80 |         92        0.92       56.64
         81 |          5        0.05       56.69
         82 |          3        0.03       56.72
         83 |          9        0.09       56.81
         84 |          5        0.05       56.86
         85 |         35        0.35       57.21
         86 |          1        0.01       57.22
         87 |          5        0.05       57.27
         88 |          3        0.03       57.30
         89 |          3        0.03       57.33
         90 |         45        0.45       57.78
         91 |          3        0.03       57.81
         92 |          4        0.04       57.85
         93 |          7        0.07       57.92
         94 |          3        0.03       57.95
         95 |          6        0.06       58.01
         96 |          8        0.08       58.09
         97 |          4        0.04       58.13
         98 |          6        0.06       58.19
         99 |          1        0.01       58.20
        100 |         43        0.43       58.63
        102 |          1        0.01       58.64
        104 |          2        0.02       58.66
        106 |          2        0.02       58.68
        109 |          2        0.02       58.70
        110 |          6        0.06       58.76
        111 |          1        0.01       58.77
        115 |          1        0.01       58.78
        117 |          1        0.01       58.79
        119 |          1        0.01       58.80
        120 |          5        0.05       58.85
        130 |          5        0.05       58.90
        135 |          1        0.01       58.91
        150 |          1        0.01       58.92
        998 |      2,650       26.50       85.42
        999 |      1,458       14.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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