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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        317        3.17        3.17
          1 |          5        0.05        3.22
          2 |          5        0.05        3.27
          3 |         16        0.16        3.43
          4 |         10        0.10        3.53
          5 |        104        1.04        4.57
          6 |          5        0.05        4.62
          7 |          3        0.03        4.65
          8 |         39        0.39        5.04
          9 |          5        0.05        5.09
         10 |        132        1.32        6.41
         11 |          2        0.02        6.43
         12 |          6        0.06        6.49
         13 |         25        0.25        6.74
         14 |          1        0.01        6.75
         15 |        101        1.01        7.76
         16 |          3        0.03        7.79
         17 |          6        0.06        7.85
         18 |         23        0.23        8.08
         19 |          4        0.04        8.12
         20 |         72        0.72        8.84
         21 |          1        0.01        8.85
         22 |          9        0.09        8.94
         23 |         25        0.25        9.19
         24 |          3        0.03        9.22
         25 |        102        1.02       10.24
         26 |          6        0.06       10.30
         27 |          7        0.07       10.37
         28 |         46        0.46       10.83
         29 |          2        0.02       10.85
         30 |        151        1.51       12.36
         31 |          7        0.07       12.43
         32 |          4        0.04       12.47
         33 |         66        0.66       13.13
         34 |          4        0.04       13.17
         35 |        223        2.23       15.40
         36 |          5        0.05       15.45
         37 |          8        0.08       15.53
         38 |        108        1.08       16.61
         39 |          6        0.06       16.67
         40 |        328        3.28       19.95
         41 |          9        0.09       20.04
         42 |          9        0.09       20.13
         43 |         82        0.82       20.95
         44 |         10        0.10       21.05
         45 |        412        4.12       25.17
         46 |         15        0.15       25.32
         47 |         14        0.14       25.46
         48 |         87        0.87       26.33
         49 |         14        0.14       26.47
         50 |        437        4.37       30.84
         51 |         13        0.13       30.97
         52 |          8        0.08       31.05
         53 |        104        1.04       32.09
         54 |         11        0.11       32.20
         55 |        703        7.03       39.23
         56 |         22        0.22       39.45
         57 |         20        0.20       39.65
         58 |         89        0.89       40.54
         59 |         14        0.14       40.68
         60 |        371        3.71       44.39
         61 |         18        0.18       44.57
         62 |         12        0.12       44.69
         63 |         86        0.86       45.55
         64 |         23        0.23       45.78
         65 |        541        5.41       51.19
         66 |         10        0.10       51.29
         67 |         13        0.13       51.42
         68 |         96        0.96       52.38
         69 |          8        0.08       52.46
         70 |        335        3.35       55.81
         71 |          6        0.06       55.87
         72 |          8        0.08       55.95
         73 |         43        0.43       56.38
         74 |         10        0.10       56.48
         75 |        217        2.17       58.65
         76 |          6        0.06       58.71
         77 |         10        0.10       58.81
         78 |         30        0.30       59.11
         79 |          2        0.02       59.13
         80 |        139        1.39       60.52
         81 |          6        0.06       60.58
         82 |          6        0.06       60.64
         83 |         12        0.12       60.76
         84 |          6        0.06       60.82
         85 |         58        0.58       61.40
         86 |          7        0.07       61.47
         87 |          6        0.06       61.53
         88 |         10        0.10       61.63
         89 |          2        0.02       61.65
         90 |         48        0.48       62.13
         91 |          3        0.03       62.16
         92 |          1        0.01       62.17
         93 |          7        0.07       62.24
         94 |          3        0.03       62.27
         95 |         15        0.15       62.42
         96 |          3        0.03       62.45
         97 |         63        0.63       63.08
         99 |      3,692       36.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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