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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        306        3.06        3.06
          1 |          5        0.05        3.11
          2 |          5        0.05        3.16
          3 |         19        0.19        3.35
          4 |          3        0.03        3.38
          5 |         95        0.95        4.33
          6 |          3        0.03        4.36
          7 |         10        0.10        4.46
          8 |         40        0.40        4.86
          9 |          2        0.02        4.88
         10 |         97        0.97        5.85
         11 |          4        0.04        5.89
         12 |          2        0.02        5.91
         13 |         33        0.33        6.24
         14 |          3        0.03        6.27
         15 |         69        0.69        6.96
         16 |          1        0.01        6.97
         17 |          5        0.05        7.02
         18 |         24        0.24        7.26
         19 |          1        0.01        7.27
         20 |         72        0.72        7.99
         21 |          3        0.03        8.02
         22 |          1        0.01        8.03
         23 |         16        0.16        8.19
         24 |          3        0.03        8.22
         25 |         95        0.95        9.17
         26 |          7        0.07        9.24
         27 |          4        0.04        9.28
         28 |         36        0.36        9.64
         29 |          4        0.04        9.68
         30 |        136        1.36       11.04
         31 |          6        0.06       11.10
         32 |          4        0.04       11.14
         33 |         62        0.62       11.76
         34 |          6        0.06       11.82
         35 |        233        2.33       14.15
         36 |         12        0.12       14.27
         37 |         15        0.15       14.42
         38 |        113        1.13       15.55
         39 |         13        0.13       15.68
         40 |        329        3.29       18.97
         41 |          5        0.05       19.02
         42 |         14        0.14       19.16
         43 |        127        1.27       20.43
         44 |         12        0.12       20.55
         45 |        404        4.04       24.59
         46 |         16        0.16       24.75
         47 |         16        0.16       24.91
         48 |        130        1.30       26.21
         49 |          8        0.08       26.29
         50 |        420        4.20       30.49
         51 |         12        0.12       30.61
         52 |         13        0.13       30.74
         53 |        120        1.20       31.94
         54 |         17        0.17       32.11
         55 |        863        8.63       40.74
         56 |         12        0.12       40.86
         57 |         23        0.23       41.09
         58 |        149        1.49       42.58
         59 |         11        0.11       42.69
         60 |        350        3.50       46.19
         61 |         11        0.11       46.30
         62 |         13        0.13       46.43
         63 |         83        0.83       47.26
         64 |         13        0.13       47.39
         65 |        405        4.05       51.44
         66 |         13        0.13       51.57
         67 |         10        0.10       51.67
         68 |         57        0.57       52.24
         69 |          8        0.08       52.32
         70 |        194        1.94       54.26
         71 |          5        0.05       54.31
         72 |          9        0.09       54.40
         73 |         40        0.40       54.80
         74 |          4        0.04       54.84
         75 |        115        1.15       55.99
         76 |          8        0.08       56.07
         77 |          5        0.05       56.12
         78 |         15        0.15       56.27
         79 |          6        0.06       56.33
         80 |        113        1.13       57.46
         81 |          7        0.07       57.53
         82 |          3        0.03       57.56
         83 |         16        0.16       57.72
         84 |          3        0.03       57.75
         85 |         45        0.45       58.20
         86 |          2        0.02       58.22
         87 |          4        0.04       58.26
         88 |          7        0.07       58.33
         89 |          4        0.04       58.37
         90 |         45        0.45       58.82
         92 |          2        0.02       58.84
         93 |          4        0.04       58.88
         94 |          3        0.03       58.91
         95 |         15        0.15       59.06
         96 |          3        0.03       59.09
         97 |         62        0.62       59.71
         99 |      4,029       40.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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