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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        295        2.95        2.95
          1 |          2        0.02        2.97
          2 |          8        0.08        3.05
          3 |          8        0.08        3.13
          4 |          7        0.07        3.20
          5 |         91        0.91        4.11
          6 |          3        0.03        4.14
          7 |          7        0.07        4.21
          8 |         34        0.34        4.55
          9 |          4        0.04        4.59
         10 |         82        0.82        5.41
         11 |          6        0.06        5.47
         12 |          6        0.06        5.53
         13 |         16        0.16        5.69
         14 |          1        0.01        5.70
         15 |         71        0.71        6.41
         16 |          2        0.02        6.43
         17 |          4        0.04        6.47
         18 |         14        0.14        6.61
         19 |          3        0.03        6.64
         20 |         50        0.50        7.14
         21 |          4        0.04        7.18
         22 |          6        0.06        7.24
         23 |         27        0.27        7.51
         24 |          3        0.03        7.54
         25 |         95        0.95        8.49
         26 |          4        0.04        8.53
         27 |          9        0.09        8.62
         28 |         32        0.32        8.94
         29 |          2        0.02        8.96
         30 |        188        1.88       10.84
         31 |         10        0.10       10.94
         32 |         10        0.10       11.04
         33 |         58        0.58       11.62
         34 |          6        0.06       11.68
         35 |        253        2.53       14.21
         36 |         12        0.12       14.33
         37 |         16        0.16       14.49
         38 |         94        0.94       15.43
         39 |         12        0.12       15.55
         40 |        353        3.53       19.08
         41 |         10        0.10       19.18
         42 |         12        0.12       19.30
         43 |         98        0.98       20.28
         44 |         19        0.19       20.47
         45 |        391        3.91       24.38
         46 |          7        0.07       24.45
         47 |         13        0.13       24.58
         48 |        108        1.08       25.66
         49 |         11        0.11       25.77
         50 |        463        4.63       30.40
         51 |          7        0.07       30.47
         52 |         14        0.14       30.61
         53 |        134        1.34       31.95
         54 |         15        0.15       32.10
         55 |        866        8.66       40.76
         56 |          8        0.08       40.84
         57 |         30        0.30       41.14
         58 |        131        1.31       42.45
         59 |         10        0.10       42.55
         60 |        335        3.35       45.90
         61 |          9        0.09       45.99
         62 |         11        0.11       46.10
         63 |         69        0.69       46.79
         64 |          8        0.08       46.87
         65 |        346        3.46       50.33
         66 |          7        0.07       50.40
         67 |         19        0.19       50.59
         68 |         62        0.62       51.21
         69 |         12        0.12       51.33
         70 |        191        1.91       53.24
         71 |          8        0.08       53.32
         72 |          6        0.06       53.38
         73 |         34        0.34       53.72
         74 |          5        0.05       53.77
         75 |        113        1.13       54.90
         76 |          5        0.05       54.95
         77 |          9        0.09       55.04
         78 |         25        0.25       55.29
         79 |          7        0.07       55.36
         80 |        102        1.02       56.38
         81 |          2        0.02       56.40
         82 |          8        0.08       56.48
         83 |         10        0.10       56.58
         84 |          2        0.02       56.60
         85 |         50        0.50       57.10
         86 |          3        0.03       57.13
         87 |          5        0.05       57.18
         88 |          7        0.07       57.25
         89 |          2        0.02       57.27
         90 |         46        0.46       57.73
         91 |          3        0.03       57.76
         93 |          3        0.03       57.79
         94 |          4        0.04       57.83
         95 |          7        0.07       57.90
         97 |         48        0.48       58.38
         99 |      4,162       41.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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