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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        362        3.62        3.62
          1 |          3        0.03        3.65
          2 |          8        0.08        3.73
          3 |         17        0.17        3.90
          4 |         16        0.16        4.06
          5 |         96        0.96        5.02
          6 |          1        0.01        5.03
          7 |          4        0.04        5.07
          8 |         27        0.27        5.34
          9 |          3        0.03        5.37
         10 |        103        1.03        6.40
         11 |          4        0.04        6.44
         12 |          4        0.04        6.48
         13 |         28        0.28        6.76
         14 |          6        0.06        6.82
         15 |         69        0.69        7.51
         16 |          5        0.05        7.56
         17 |          3        0.03        7.59
         18 |         24        0.24        7.83
         19 |          3        0.03        7.86
         20 |         78        0.78        8.64
         21 |          3        0.03        8.67
         22 |          6        0.06        8.73
         23 |         15        0.15        8.88
         24 |          1        0.01        8.89
         25 |         88        0.88        9.77
         26 |          3        0.03        9.80
         27 |          4        0.04        9.84
         28 |         26        0.26       10.10
         29 |          6        0.06       10.16
         30 |        138        1.38       11.54
         31 |          5        0.05       11.59
         32 |          8        0.08       11.67
         33 |         51        0.51       12.18
         34 |          6        0.06       12.24
         35 |        266        2.66       14.90
         36 |          9        0.09       14.99
         37 |          9        0.09       15.08
         38 |         94        0.94       16.02
         39 |          5        0.05       16.07
         40 |        317        3.17       19.24
         41 |         20        0.20       19.44
         42 |         14        0.14       19.58
         43 |         90        0.90       20.48
         44 |          9        0.09       20.57
         45 |        391        3.91       24.48
         46 |          7        0.07       24.55
         47 |         16        0.16       24.71
         48 |        106        1.06       25.77
         49 |          8        0.08       25.85
         50 |        376        3.76       29.61
         51 |         16        0.16       29.77
         52 |         16        0.16       29.93
         53 |         93        0.93       30.86
         54 |          5        0.05       30.91
         55 |        707        7.07       37.98
         56 |         10        0.10       38.08
         57 |         16        0.16       38.24
         58 |        100        1.00       39.24
         59 |          8        0.08       39.32
         60 |        334        3.34       42.66
         61 |         10        0.10       42.76
         62 |         18        0.18       42.94
         63 |         80        0.80       43.74
         64 |          5        0.05       43.79
         65 |        558        5.58       49.37
         66 |         13        0.13       49.50
         67 |         12        0.12       49.62
         68 |         93        0.93       50.55
         69 |         12        0.12       50.67
         70 |        346        3.46       54.13
         71 |          5        0.05       54.18
         72 |         12        0.12       54.30
         73 |         35        0.35       54.65
         74 |          8        0.08       54.73
         75 |        229        2.29       57.02
         76 |          4        0.04       57.06
         77 |         11        0.11       57.17
         78 |         26        0.26       57.43
         80 |        119        1.19       58.62
         81 |          3        0.03       58.65
         82 |          5        0.05       58.70
         83 |         16        0.16       58.86
         84 |          5        0.05       58.91
         85 |         58        0.58       59.49
         86 |          4        0.04       59.53
         87 |          3        0.03       59.56
         88 |         13        0.13       59.69
         89 |          3        0.03       59.72
         90 |         57        0.57       60.29
         91 |          2        0.02       60.31
         92 |          1        0.01       60.32
         93 |          4        0.04       60.36
         94 |          3        0.03       60.39
         95 |         19        0.19       60.58
         97 |         73        0.73       61.31
         98 |      1,480       14.80       76.11
         99 |      2,389       23.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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