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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        352        3.52        3.52
          1 |          3        0.03        3.55
          2 |          4        0.04        3.59
          3 |         14        0.14        3.73
          4 |         12        0.12        3.85
          5 |         71        0.71        4.56
          6 |          2        0.02        4.58
          7 |         10        0.10        4.68
          8 |         13        0.13        4.81
          9 |          1        0.01        4.82
         10 |         88        0.88        5.70
         11 |          1        0.01        5.71
         12 |          6        0.06        5.77
         13 |         24        0.24        6.01
         14 |          1        0.01        6.02
         15 |         73        0.73        6.75
         16 |          5        0.05        6.80
         17 |          7        0.07        6.87
         18 |         16        0.16        7.03
         19 |          4        0.04        7.07
         20 |         62        0.62        7.69
         21 |          4        0.04        7.73
         22 |          5        0.05        7.78
         23 |         18        0.18        7.96
         24 |          4        0.04        8.00
         25 |         66        0.66        8.66
         26 |          2        0.02        8.68
         27 |          5        0.05        8.73
         28 |         27        0.27        9.00
         29 |          3        0.03        9.03
         30 |        110        1.10       10.13
         31 |          5        0.05       10.18
         32 |          7        0.07       10.25
         33 |         43        0.43       10.68
         34 |          7        0.07       10.75
         35 |        187        1.87       12.62
         36 |         11        0.11       12.73
         37 |         16        0.16       12.89
         38 |         60        0.60       13.49
         39 |          9        0.09       13.58
         40 |        272        2.72       16.30
         41 |          5        0.05       16.35
         42 |          6        0.06       16.41
         43 |         68        0.68       17.09
         44 |         10        0.10       17.19
         45 |        344        3.44       20.63
         46 |          4        0.04       20.67
         47 |         28        0.28       20.95
         48 |         72        0.72       21.67
         49 |          8        0.08       21.75
         50 |        321        3.21       24.96
         51 |         12        0.12       25.08
         52 |         17        0.17       25.25
         53 |         82        0.82       26.07
         54 |         12        0.12       26.19
         55 |        577        5.77       31.96
         56 |         10        0.10       32.06
         57 |         18        0.18       32.24
         58 |         75        0.75       32.99
         59 |         11        0.11       33.10
         60 |        304        3.04       36.14
         61 |          9        0.09       36.23
         62 |          4        0.04       36.27
         63 |         56        0.56       36.83
         64 |          9        0.09       36.92
         65 |        451        4.51       41.43
         66 |          7        0.07       41.50
         67 |         17        0.17       41.67
         68 |         90        0.90       42.57
         69 |          3        0.03       42.60
         70 |        319        3.19       45.79
         71 |          4        0.04       45.83
         72 |          9        0.09       45.92
         73 |         27        0.27       46.19
         74 |          3        0.03       46.22
         75 |        123        1.23       47.45
         76 |          2        0.02       47.47
         77 |          6        0.06       47.53
         78 |         25        0.25       47.78
         79 |          4        0.04       47.82
         80 |        121        1.21       49.03
         81 |          5        0.05       49.08
         82 |          2        0.02       49.10
         83 |         18        0.18       49.28
         84 |          1        0.01       49.29
         85 |         58        0.58       49.87
         86 |          3        0.03       49.90
         87 |          5        0.05       49.95
         88 |          9        0.09       50.04
         89 |          3        0.03       50.07
         90 |         63        0.63       50.70
         92 |          2        0.02       50.72
         93 |          8        0.08       50.80
         95 |         18        0.18       50.98
         96 |          1        0.01       50.99
         97 |         72        0.72       51.71
         98 |      3,361       33.61       85.32
         99 |      1,468       14.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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