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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        372        3.72        3.72
          1 |          7        0.07        3.79
          2 |          5        0.05        3.84
          3 |         17        0.17        4.01
          4 |          8        0.08        4.09
          5 |         82        0.82        4.91
          6 |          1        0.01        4.92
          7 |          1        0.01        4.93
          8 |         36        0.36        5.29
          9 |          3        0.03        5.32
         10 |        101        1.01        6.33
         11 |          1        0.01        6.34
         12 |          7        0.07        6.41
         13 |         19        0.19        6.60
         14 |          3        0.03        6.63
         15 |         68        0.68        7.31
         16 |          1        0.01        7.32
         17 |          2        0.02        7.34
         18 |         15        0.15        7.49
         19 |          4        0.04        7.53
         20 |         65        0.65        8.18
         21 |          3        0.03        8.21
         22 |          3        0.03        8.24
         23 |         19        0.19        8.43
         24 |          1        0.01        8.44
         25 |         95        0.95        9.39
         26 |          3        0.03        9.42
         27 |          5        0.05        9.47
         28 |         43        0.43        9.90
         29 |          6        0.06        9.96
         30 |        141        1.41       11.37
         31 |          8        0.08       11.45
         32 |          2        0.02       11.47
         33 |         57        0.57       12.04
         34 |          7        0.07       12.11
         35 |        239        2.39       14.50
         36 |         10        0.10       14.60
         37 |         12        0.12       14.72
         38 |        101        1.01       15.73
         39 |          7        0.07       15.80
         40 |        320        3.20       19.00
         41 |         13        0.13       19.13
         42 |         15        0.15       19.28
         43 |         86        0.86       20.14
         44 |         13        0.13       20.27
         45 |        385        3.85       24.12
         46 |         16        0.16       24.28
         47 |         17        0.17       24.45
         48 |         88        0.88       25.33
         49 |         13        0.13       25.46
         50 |        358        3.58       29.04
         51 |         14        0.14       29.18
         52 |         16        0.16       29.34
         53 |         74        0.74       30.08
         54 |          7        0.07       30.15
         55 |        713        7.13       37.28
         56 |         13        0.13       37.41
         57 |         18        0.18       37.59
         58 |         93        0.93       38.52
         59 |         11        0.11       38.63
         60 |        364        3.64       42.27
         61 |          7        0.07       42.34
         62 |         16        0.16       42.50
         63 |         61        0.61       43.11
         64 |         10        0.10       43.21
         65 |        519        5.19       48.40
         66 |         16        0.16       48.56
         67 |         14        0.14       48.70
         68 |        101        1.01       49.71
         69 |         10        0.10       49.81
         70 |        395        3.95       53.76
         71 |         14        0.14       53.90
         72 |         17        0.17       54.07
         73 |         42        0.42       54.49
         74 |         11        0.11       54.60
         75 |        223        2.23       56.83
         76 |          4        0.04       56.87
         77 |         13        0.13       57.00
         78 |         37        0.37       57.37
         79 |          4        0.04       57.41
         80 |        123        1.23       58.64
         81 |          5        0.05       58.69
         82 |         13        0.13       58.82
         83 |         18        0.18       59.00
         84 |          4        0.04       59.04
         85 |         51        0.51       59.55
         86 |          9        0.09       59.64
         87 |         10        0.10       59.74
         88 |         11        0.11       59.85
         89 |          2        0.02       59.87
         90 |         53        0.53       60.40
         91 |          1        0.01       60.41
         93 |          7        0.07       60.48
         94 |          4        0.04       60.52
         95 |         18        0.18       60.70
         96 |          4        0.04       60.74
         97 |         87        0.87       61.61
         98 |      1,735       17.35       78.96
         99 |      2,104       21.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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