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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        358        3.58        3.58
          1 |          3        0.03        3.61
          2 |          5        0.05        3.66
          3 |         15        0.15        3.81
          4 |          3        0.03        3.84
          5 |         78        0.78        4.62
          6 |          2        0.02        4.64
          7 |          6        0.06        4.70
          8 |         22        0.22        4.92
          9 |          5        0.05        4.97
         10 |        111        1.11        6.08
         11 |          2        0.02        6.10
         12 |          5        0.05        6.15
         13 |         29        0.29        6.44
         14 |          4        0.04        6.48
         15 |         93        0.93        7.41
         16 |          1        0.01        7.42
         17 |          4        0.04        7.46
         18 |         16        0.16        7.62
         19 |          5        0.05        7.67
         20 |         73        0.73        8.40
         21 |          2        0.02        8.42
         22 |          6        0.06        8.48
         23 |         29        0.29        8.77
         24 |          4        0.04        8.81
         25 |        108        1.08        9.89
         26 |          4        0.04        9.93
         27 |          8        0.08       10.01
         28 |         42        0.42       10.43
         29 |          2        0.02       10.45
         30 |        153        1.53       11.98
         31 |          5        0.05       12.03
         32 |          5        0.05       12.08
         33 |         55        0.55       12.63
         34 |          1        0.01       12.64
         35 |        256        2.56       15.20
         36 |         10        0.10       15.30
         37 |         14        0.14       15.44
         38 |         80        0.80       16.24
         39 |         14        0.14       16.38
         40 |        363        3.63       20.01
         41 |          8        0.08       20.09
         42 |          8        0.08       20.17
         43 |        106        1.06       21.23
         44 |         14        0.14       21.37
         45 |        413        4.13       25.50
         46 |          7        0.07       25.57
         47 |         15        0.15       25.72
         48 |         82        0.82       26.54
         49 |         11        0.11       26.65
         50 |        424        4.24       30.89
         51 |         11        0.11       31.00
         52 |         19        0.19       31.19
         53 |         97        0.97       32.16
         54 |         10        0.10       32.26
         55 |        685        6.85       39.11
         56 |         15        0.15       39.26
         57 |         11        0.11       39.37
         58 |        117        1.17       40.54
         59 |         13        0.13       40.67
         60 |        365        3.65       44.32
         61 |          7        0.07       44.39
         62 |         13        0.13       44.52
         63 |         79        0.79       45.31
         64 |         16        0.16       45.47
         65 |        539        5.39       50.86
         66 |          8        0.08       50.94
         67 |         13        0.13       51.07
         68 |         81        0.81       51.88
         69 |         10        0.10       51.98
         70 |        280        2.80       54.78
         71 |          9        0.09       54.87
         72 |         12        0.12       54.99
         73 |         28        0.28       55.27
         74 |          6        0.06       55.33
         75 |        188        1.88       57.21
         76 |          4        0.04       57.25
         77 |          8        0.08       57.33
         78 |         22        0.22       57.55
         79 |          6        0.06       57.61
         80 |        129        1.29       58.90
         81 |         14        0.14       59.04
         82 |          4        0.04       59.08
         83 |         11        0.11       59.19
         84 |          5        0.05       59.24
         85 |         47        0.47       59.71
         86 |          7        0.07       59.78
         87 |          4        0.04       59.82
         88 |         13        0.13       59.95
         89 |          2        0.02       59.97
         90 |         49        0.49       60.46
         91 |          2        0.02       60.48
         92 |          1        0.01       60.49
         93 |          1        0.01       60.50
         94 |          1        0.01       60.51
         95 |         10        0.10       60.61
         96 |          1        0.01       60.62
         97 |         63        0.63       61.25
         99 |      3,875       38.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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