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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        417        4.17        4.17
          1 |          4        0.04        4.21
          2 |          7        0.07        4.28
          3 |          9        0.09        4.37
          4 |          3        0.03        4.40
          5 |         80        0.80        5.20
          6 |          3        0.03        5.23
          7 |          8        0.08        5.31
          8 |         12        0.12        5.43
          9 |          3        0.03        5.46
         10 |        111        1.11        6.57
         11 |          3        0.03        6.60
         12 |          8        0.08        6.68
         13 |         13        0.13        6.81
         14 |          2        0.02        6.83
         15 |         87        0.87        7.70
         16 |          2        0.02        7.72
         17 |          5        0.05        7.77
         18 |         16        0.16        7.93
         19 |          4        0.04        7.97
         20 |         76        0.76        8.73
         21 |          1        0.01        8.74
         22 |          6        0.06        8.80
         23 |          9        0.09        8.89
         24 |          3        0.03        8.92
         25 |         84        0.84        9.76
         26 |          6        0.06        9.82
         27 |         10        0.10        9.92
         28 |         27        0.27       10.19
         29 |          6        0.06       10.25
         30 |        160        1.60       11.85
         31 |          8        0.08       11.93
         32 |         10        0.10       12.03
         33 |         40        0.40       12.43
         34 |         17        0.17       12.60
         35 |        249        2.49       15.09
         36 |          9        0.09       15.18
         37 |         17        0.17       15.35
         38 |         46        0.46       15.81
         39 |          7        0.07       15.88
         40 |        297        2.97       18.85
         41 |          8        0.08       18.93
         42 |         13        0.13       19.06
         43 |         53        0.53       19.59
         44 |          6        0.06       19.65
         45 |        376        3.76       23.41
         46 |         10        0.10       23.51
         47 |         21        0.21       23.72
         48 |         43        0.43       24.15
         49 |          7        0.07       24.22
         50 |        396        3.96       28.18
         51 |          8        0.08       28.26
         52 |          7        0.07       28.33
         53 |         63        0.63       28.96
         54 |         11        0.11       29.07
         55 |        608        6.08       35.15
         56 |         10        0.10       35.25
         57 |          6        0.06       35.31
         58 |         55        0.55       35.86
         59 |          9        0.09       35.95
         60 |        333        3.33       39.28
         61 |         11        0.11       39.39
         62 |         11        0.11       39.50
         63 |         49        0.49       39.99
         64 |          9        0.09       40.08
         65 |        525        5.25       45.33
         66 |         12        0.12       45.45
         67 |         18        0.18       45.63
         68 |         81        0.81       46.44
         69 |          6        0.06       46.50
         70 |        336        3.36       49.86
         71 |          5        0.05       49.91
         72 |         13        0.13       50.04
         73 |         27        0.27       50.31
         74 |          2        0.02       50.33
         75 |        164        1.64       51.97
         76 |          3        0.03       52.00
         77 |          6        0.06       52.06
         78 |         21        0.21       52.27
         79 |          4        0.04       52.31
         80 |        111        1.11       53.42
         81 |          2        0.02       53.44
         82 |          4        0.04       53.48
         83 |         11        0.11       53.59
         84 |          2        0.02       53.61
         85 |         58        0.58       54.19
         86 |          1        0.01       54.20
         87 |          4        0.04       54.24
         88 |          7        0.07       54.31
         89 |          3        0.03       54.34
         90 |         46        0.46       54.80
         91 |          3        0.03       54.83
         92 |          4        0.04       54.87
         93 |          3        0.03       54.90
         94 |          2        0.02       54.92
         95 |         13        0.13       55.05
         96 |          3        0.03       55.08
         97 |        101        1.01       56.09
         98 |      3,141       31.41       87.50
         99 |      1,250       12.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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