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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        309        3.09        3.09
          1 |          3        0.03        3.12
          2 |          8        0.08        3.20
          3 |         18        0.18        3.38
          4 |          5        0.05        3.43
          5 |         77        0.77        4.20
          6 |          1        0.01        4.21
          7 |          3        0.03        4.24
          8 |         27        0.27        4.51
          9 |          7        0.07        4.58
         10 |         98        0.98        5.56
         11 |          3        0.03        5.59
         12 |          2        0.02        5.61
         13 |         21        0.21        5.82
         14 |          3        0.03        5.85
         15 |         71        0.71        6.56
         16 |          3        0.03        6.59
         17 |          1        0.01        6.60
         18 |         27        0.27        6.87
         19 |          2        0.02        6.89
         20 |         68        0.68        7.57
         21 |          3        0.03        7.60
         22 |          3        0.03        7.63
         23 |         24        0.24        7.87
         24 |          2        0.02        7.89
         25 |        100        1.00        8.89
         26 |          8        0.08        8.97
         27 |          7        0.07        9.04
         28 |         46        0.46        9.50
         29 |          3        0.03        9.53
         30 |        136        1.36       10.89
         31 |          5        0.05       10.94
         32 |          8        0.08       11.02
         33 |         61        0.61       11.63
         34 |         13        0.13       11.76
         35 |        231        2.31       14.07
         36 |          7        0.07       14.14
         37 |          9        0.09       14.23
         38 |         90        0.90       15.13
         39 |         11        0.11       15.24
         40 |        302        3.02       18.26
         41 |         11        0.11       18.37
         42 |         11        0.11       18.48
         43 |         86        0.86       19.34
         44 |         17        0.17       19.51
         45 |        340        3.40       22.91
         46 |          9        0.09       23.00
         47 |          7        0.07       23.07
         48 |         98        0.98       24.05
         49 |         13        0.13       24.18
         50 |        494        4.94       29.12
         51 |         12        0.12       29.24
         52 |         15        0.15       29.39
         53 |        121        1.21       30.60
         54 |          9        0.09       30.69
         55 |        892        8.92       39.61
         56 |         10        0.10       39.71
         57 |         20        0.20       39.91
         58 |        127        1.27       41.18
         59 |          7        0.07       41.25
         60 |        350        3.50       44.75
         61 |         11        0.11       44.86
         62 |         13        0.13       44.99
         63 |         81        0.81       45.80
         64 |          9        0.09       45.89
         65 |        368        3.68       49.57
         66 |          8        0.08       49.65
         67 |          9        0.09       49.74
         68 |         64        0.64       50.38
         69 |          4        0.04       50.42
         70 |        190        1.90       52.32
         71 |          9        0.09       52.41
         72 |          9        0.09       52.50
         73 |         30        0.30       52.80
         74 |          7        0.07       52.87
         75 |        114        1.14       54.01
         76 |          5        0.05       54.06
         77 |          5        0.05       54.11
         78 |         24        0.24       54.35
         79 |          5        0.05       54.40
         80 |         97        0.97       55.37
         81 |          1        0.01       55.38
         82 |          4        0.04       55.42
         83 |         15        0.15       55.57
         84 |          3        0.03       55.60
         85 |         52        0.52       56.12
         86 |          4        0.04       56.16
         87 |          7        0.07       56.23
         88 |          5        0.05       56.28
         89 |          2        0.02       56.30
         90 |         60        0.60       56.90
         91 |          3        0.03       56.93
         92 |          1        0.01       56.94
         93 |          7        0.07       57.01
         94 |          2        0.02       57.03
         95 |          6        0.06       57.09
         96 |          1        0.01       57.10
         97 |         58        0.58       57.68
         99 |      4,232       42.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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