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

     Travel |
      Speed |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        260        2.60        2.60
          1 |          3        0.03        2.63
          2 |         11        0.11        2.74
          3 |         15        0.15        2.89
          4 |          6        0.06        2.95
          5 |         82        0.82        3.77
          6 |          2        0.02        3.79
          7 |          9        0.09        3.88
          8 |         15        0.15        4.03
          9 |          2        0.02        4.05
         10 |         98        0.98        5.03
         11 |          1        0.01        5.04
         12 |          7        0.07        5.11
         13 |         18        0.18        5.29
         14 |          2        0.02        5.31
         15 |         68        0.68        5.99
         16 |          1        0.01        6.00
         17 |          4        0.04        6.04
         18 |         28        0.28        6.32
         20 |         68        0.68        7.00
         21 |          2        0.02        7.02
         22 |          1        0.01        7.03
         23 |         33        0.33        7.36
         24 |          2        0.02        7.38
         25 |        130        1.30        8.68
         26 |          2        0.02        8.70
         27 |          5        0.05        8.75
         28 |         35        0.35        9.10
         29 |          2        0.02        9.12
         30 |        190        1.90       11.02
         31 |          6        0.06       11.08
         32 |          7        0.07       11.15
         33 |         49        0.49       11.64
         34 |         10        0.10       11.74
         35 |        248        2.48       14.22
         36 |         12        0.12       14.34
         37 |          8        0.08       14.42
         38 |         88        0.88       15.30
         39 |          3        0.03       15.33
         40 |        361        3.61       18.94
         41 |          6        0.06       19.00
         42 |         13        0.13       19.13
         43 |         92        0.92       20.05
         44 |         11        0.11       20.16
         45 |        343        3.43       23.59
         47 |         14        0.14       23.73
         48 |         85        0.85       24.58
         49 |          4        0.04       24.62
         50 |        482        4.82       29.44
         51 |         14        0.14       29.58
         52 |         10        0.10       29.68
         53 |        144        1.44       31.12
         54 |         15        0.15       31.27
         55 |        826        8.26       39.53
         56 |         16        0.16       39.69
         57 |         21        0.21       39.90
         58 |        136        1.36       41.26
         59 |          9        0.09       41.35
         60 |        303        3.03       44.38
         61 |          9        0.09       44.47
         62 |          9        0.09       44.56
         63 |         41        0.41       44.97
         64 |          8        0.08       45.05
         65 |        166        1.66       46.71
         66 |          8        0.08       46.79
         67 |         13        0.13       46.92
         68 |         40        0.40       47.32
         69 |          6        0.06       47.38
         70 |        177        1.77       49.15
         71 |         10        0.10       49.25
         72 |          1        0.01       49.26
         73 |         26        0.26       49.52
         74 |          8        0.08       49.60
         75 |         93        0.93       50.53
         76 |          5        0.05       50.58
         77 |          4        0.04       50.62
         78 |         18        0.18       50.80
         79 |          1        0.01       50.81
         80 |         85        0.85       51.66
         81 |          5        0.05       51.71
         82 |          6        0.06       51.77
         83 |          6        0.06       51.83
         84 |          4        0.04       51.87
         85 |         36        0.36       52.23
         86 |          2        0.02       52.25
         87 |          2        0.02       52.27
         88 |          5        0.05       52.32
         89 |          2        0.02       52.34
         90 |         35        0.35       52.69
         91 |          1        0.01       52.70
         92 |          4        0.04       52.74
         93 |          5        0.05       52.79
         94 |          2        0.02       52.81
         95 |         12        0.12       52.93
         97 |         44        0.44       53.37
         99 |      4,663       46.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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