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

     TRAVEL |
      SPEED |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        379        3.79        3.79
          1 |          5        0.05        3.84
          2 |          4        0.04        3.88
          3 |         12        0.12        4.00
          4 |          8        0.08        4.08
          5 |         73        0.73        4.81
          6 |          3        0.03        4.84
          7 |          2        0.02        4.86
          8 |         27        0.27        5.13
          9 |          3        0.03        5.16
         10 |         91        0.91        6.07
         11 |          2        0.02        6.09
         12 |          9        0.09        6.18
         13 |         27        0.27        6.45
         14 |          5        0.05        6.50
         15 |         66        0.66        7.16
         16 |          5        0.05        7.21
         17 |          4        0.04        7.25
         18 |         22        0.22        7.47
         19 |          4        0.04        7.51
         20 |         63        0.63        8.14
         21 |          4        0.04        8.18
         22 |          5        0.05        8.23
         23 |         28        0.28        8.51
         24 |          6        0.06        8.57
         25 |         78        0.78        9.35
         26 |          4        0.04        9.39
         27 |          2        0.02        9.41
         28 |         47        0.47        9.88
         29 |         10        0.10        9.98
         30 |        131        1.31       11.29
         31 |          9        0.09       11.38
         32 |          5        0.05       11.43
         33 |         38        0.38       11.81
         34 |          7        0.07       11.88
         35 |        232        2.32       14.20
         36 |          3        0.03       14.23
         37 |          7        0.07       14.30
         38 |         78        0.78       15.08
         39 |         15        0.15       15.23
         40 |        277        2.77       18.00
         41 |         10        0.10       18.10
         42 |         14        0.14       18.24
         43 |         96        0.96       19.20
         44 |         16        0.16       19.36
         45 |        369        3.69       23.05
         46 |         10        0.10       23.15
         47 |         19        0.19       23.34
         48 |         86        0.86       24.20
         49 |          6        0.06       24.26
         50 |        376        3.76       28.02
         51 |         11        0.11       28.13
         52 |         12        0.12       28.25
         53 |         93        0.93       29.18
         54 |         19        0.19       29.37
         55 |        613        6.13       35.50
         56 |          8        0.08       35.58
         57 |         19        0.19       35.77
         58 |        102        1.02       36.79
         59 |          9        0.09       36.88
         60 |        330        3.30       40.18
         61 |         11        0.11       40.29
         62 |         11        0.11       40.40
         63 |         81        0.81       41.21
         64 |         10        0.10       41.31
         65 |        550        5.50       46.81
         66 |          8        0.08       46.89
         67 |          7        0.07       46.96
         68 |        103        1.03       47.99
         69 |          8        0.08       48.07
         70 |        360        3.60       51.67
         71 |         12        0.12       51.79
         72 |         12        0.12       51.91
         73 |         43        0.43       52.34
         74 |         19        0.19       52.53
         75 |        226        2.26       54.79
         76 |          6        0.06       54.85
         77 |          9        0.09       54.94
         78 |         37        0.37       55.31
         79 |          3        0.03       55.34
         80 |        148        1.48       56.82
         81 |          7        0.07       56.89
         82 |          6        0.06       56.95
         83 |         24        0.24       57.19
         84 |          2        0.02       57.21
         85 |         85        0.85       58.06
         86 |          2        0.02       58.08
         87 |          4        0.04       58.12
         88 |         17        0.17       58.29
         89 |          5        0.05       58.34
         90 |         67        0.67       59.01
         91 |          3        0.03       59.04
         92 |          3        0.03       59.07
         93 |          6        0.06       59.13
         95 |         23        0.23       59.36
         96 |          2        0.02       59.38
         97 |         93        0.93       60.31
         98 |      2,344       23.44       83.75
         99 |      1,625       16.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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