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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        334        3.34        3.34
          1 |          1        0.01        3.35
          2 |         11        0.11        3.46
          3 |         11        0.11        3.57
          4 |          6        0.06        3.63
          5 |         70        0.70        4.33
          6 |          3        0.03        4.36
          7 |          7        0.07        4.43
          8 |         16        0.16        4.59
          9 |          3        0.03        4.62
         10 |         79        0.79        5.41
         11 |          2        0.02        5.43
         12 |         11        0.11        5.54
         13 |         26        0.26        5.80
         14 |          3        0.03        5.83
         15 |         71        0.71        6.54
         16 |          4        0.04        6.58
         17 |          2        0.02        6.60
         18 |         17        0.17        6.77
         19 |          5        0.05        6.82
         20 |         70        0.70        7.52
         21 |          3        0.03        7.55
         22 |          4        0.04        7.59
         23 |         25        0.25        7.84
         24 |          6        0.06        7.90
         25 |        102        1.02        8.92
         26 |          1        0.01        8.93
         27 |          6        0.06        8.99
         28 |         45        0.45        9.44
         29 |         10        0.10        9.54
         30 |        156        1.56       11.10
         31 |          6        0.06       11.16
         32 |          8        0.08       11.24
         33 |         74        0.74       11.98
         34 |         10        0.10       12.08
         35 |        252        2.52       14.60
         36 |         13        0.13       14.73
         37 |         12        0.12       14.85
         38 |        109        1.09       15.94
         39 |         11        0.11       16.05
         40 |        299        2.99       19.04
         41 |          4        0.04       19.08
         42 |         10        0.10       19.18
         43 |         94        0.94       20.12
         44 |          8        0.08       20.20
         45 |        377        3.77       23.97
         46 |         11        0.11       24.08
         47 |          8        0.08       24.16
         48 |        124        1.24       25.40
         49 |         14        0.14       25.54
         50 |        485        4.85       30.39
         51 |         14        0.14       30.53
         52 |         15        0.15       30.68
         53 |        134        1.34       32.02
         54 |         12        0.12       32.14
         55 |        823        8.23       40.37
         56 |         17        0.17       40.54
         57 |         13        0.13       40.67
         58 |        146        1.46       42.13
         59 |          7        0.07       42.20
         60 |        331        3.31       45.51
         61 |         19        0.19       45.70
         62 |         18        0.18       45.88
         63 |         85        0.85       46.73
         64 |         14        0.14       46.87
         65 |        363        3.63       50.50
         66 |         14        0.14       50.64
         67 |         11        0.11       50.75
         68 |         63        0.63       51.38
         69 |          7        0.07       51.45
         70 |        207        2.07       53.52
         71 |          4        0.04       53.56
         72 |          6        0.06       53.62
         73 |         33        0.33       53.95
         74 |          6        0.06       54.01
         75 |        100        1.00       55.01
         76 |          5        0.05       55.06
         77 |          8        0.08       55.14
         78 |         31        0.31       55.45
         79 |          4        0.04       55.49
         80 |         90        0.90       56.39
         81 |          2        0.02       56.41
         82 |          4        0.04       56.45
         83 |         12        0.12       56.57
         84 |          3        0.03       56.60
         85 |         47        0.47       57.07
         86 |          4        0.04       57.11
         87 |          4        0.04       57.15
         88 |         12        0.12       57.27
         89 |          4        0.04       57.31
         90 |         39        0.39       57.70
         91 |          4        0.04       57.74
         92 |          2        0.02       57.76
         93 |          2        0.02       57.78
         94 |          4        0.04       57.82
         95 |         15        0.15       57.97
         96 |          2        0.02       57.99
         97 |         59        0.59       58.58
         99 |      4,142       41.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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