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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        322        3.22        3.22
          1 |          5        0.05        3.27
          2 |         11        0.11        3.38
          3 |         15        0.15        3.53
          4 |          9        0.09        3.62
          5 |         91        0.91        4.53
          6 |          1        0.01        4.54
          7 |          5        0.05        4.59
          8 |         28        0.28        4.87
          9 |          3        0.03        4.90
         10 |        101        1.01        5.91
         11 |          2        0.02        5.93
         12 |          4        0.04        5.97
         13 |         27        0.27        6.24
         14 |          3        0.03        6.27
         15 |         72        0.72        6.99
         16 |          2        0.02        7.01
         17 |          5        0.05        7.06
         18 |         20        0.20        7.26
         19 |          2        0.02        7.28
         20 |         62        0.62        7.90
         21 |          1        0.01        7.91
         22 |          3        0.03        7.94
         23 |         27        0.27        8.21
         24 |          4        0.04        8.25
         25 |        106        1.06        9.31
         26 |          4        0.04        9.35
         27 |          2        0.02        9.37
         28 |         44        0.44        9.81
         29 |          4        0.04        9.85
         30 |        148        1.48       11.33
         31 |          6        0.06       11.39
         32 |         14        0.14       11.53
         33 |         72        0.72       12.25
         34 |          3        0.03       12.28
         35 |        231        2.31       14.59
         36 |         11        0.11       14.70
         37 |         11        0.11       14.81
         38 |         91        0.91       15.72
         39 |          8        0.08       15.80
         40 |        340        3.40       19.20
         41 |         11        0.11       19.31
         42 |          8        0.08       19.39
         43 |        119        1.19       20.58
         44 |         10        0.10       20.68
         45 |        408        4.08       24.76
         46 |          6        0.06       24.82
         47 |          9        0.09       24.91
         48 |        101        1.01       25.92
         49 |         10        0.10       26.02
         50 |        475        4.75       30.77
         51 |         14        0.14       30.91
         52 |         12        0.12       31.03
         53 |        107        1.07       32.10
         54 |         16        0.16       32.26
         55 |        817        8.17       40.43
         56 |          7        0.07       40.50
         57 |         11        0.11       40.61
         58 |        124        1.24       41.85
         59 |          9        0.09       41.94
         60 |        390        3.90       45.84
         61 |         11        0.11       45.95
         62 |         12        0.12       46.07
         63 |         82        0.82       46.89
         64 |         10        0.10       46.99
         65 |        460        4.60       51.59
         66 |         13        0.13       51.72
         67 |          6        0.06       51.78
         68 |         89        0.89       52.67
         69 |         11        0.11       52.78
         70 |        284        2.84       55.62
         71 |          4        0.04       55.66
         72 |          7        0.07       55.73
         73 |         38        0.38       56.11
         74 |          3        0.03       56.14
         75 |        152        1.52       57.66
         76 |          7        0.07       57.73
         77 |          8        0.08       57.81
         78 |         17        0.17       57.98
         79 |          5        0.05       58.03
         80 |        119        1.19       59.22
         81 |          6        0.06       59.28
         82 |          7        0.07       59.35
         83 |         11        0.11       59.46
         84 |          2        0.02       59.48
         85 |         59        0.59       60.07
         86 |          2        0.02       60.09
         87 |          4        0.04       60.13
         88 |         14        0.14       60.27
         89 |          6        0.06       60.33
         90 |         58        0.58       60.91
         92 |          4        0.04       60.95
         93 |         13        0.13       61.08
         94 |          1        0.01       61.09
         95 |          9        0.09       61.18
         97 |         69        0.69       61.87
         99 |      3,813       38.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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