Frequencies for first 10,000 rows of county variable in accident dataset :

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |        400        4.00        4.01
          3 |        247        2.47        6.48
          5 |        179        1.79        8.27
          7 |        131        1.31        9.58
          9 |        220        2.20       11.78
         10 |          1        0.01       11.79
         11 |        187        1.87       13.66
         12 |         15        0.15       13.81
         13 |        490        4.90       18.71
         15 |        123        1.23       19.94
         17 |        103        1.03       20.97
         19 |        295        2.95       23.92
         20 |         26        0.26       24.18
         21 |        106        1.06       25.24
         23 |         65        0.65       25.89
         25 |        314        3.14       29.03
         27 |         70        0.70       29.73
         29 |        179        1.79       31.52
         31 |        155        1.55       33.07
         33 |         73        0.73       33.80
         35 |         43        0.43       34.23
         37 |      1,154       11.54       45.77
         39 |         81        0.81       46.58
         41 |         69        0.69       47.27
         43 |         42        0.42       47.69
         45 |         71        0.71       48.40
         47 |         77        0.77       49.17
         49 |         33        0.33       49.50
         51 |         52        0.52       50.02
         53 |         98        0.98       51.00
         55 |         69        0.69       51.69
         57 |        139        1.39       53.08
         59 |        331        3.31       56.39
         61 |         56        0.56       56.95
         63 |         46        0.46       57.41
         65 |        309        3.09       60.50
         67 |        177        1.77       62.27
         69 |         99        0.99       63.26
         70 |          2        0.02       63.28
         71 |        441        4.41       67.69
         73 |        531        5.31       73.00
         75 |        101        1.01       74.01
         77 |        147        1.47       75.48
         79 |         65        0.65       76.13
         81 |        111        1.11       77.24
         83 |        103        1.03       78.27
         85 |        191        1.91       80.18
         87 |         84        0.84       81.02
         89 |         91        0.91       81.93
         90 |         10        0.10       82.03
         91 |         42        0.42       82.45
         93 |         42        0.42       82.87
         94 |          1        0.01       82.88
         95 |        160        1.60       84.48
         97 |        171        1.71       86.19
         99 |        185        1.85       88.04
        101 |        113        1.13       89.17
        103 |         97        0.97       90.14
        105 |         95        0.95       91.09
        107 |        125        1.25       92.34
        109 |         34        0.34       92.68
        110 |          5        0.05       92.73
        111 |        132        1.32       94.05
        113 |         67        0.67       94.72
        115 |         65        0.65       95.37
        117 |         61        0.61       95.98
        119 |         62        0.62       96.60
        121 |         30        0.30       96.90
        122 |          5        0.05       96.95
        123 |         54        0.54       97.49
        125 |         34        0.34       97.83
        127 |         73        0.73       98.56
        129 |         12        0.12       98.68
        130 |          1        0.01       98.69
        131 |         22        0.22       98.91
        133 |         12        0.12       99.03
        135 |          6        0.06       99.09
        137 |          4        0.04       99.13
        139 |          9        0.09       99.22
        141 |          4        0.04       99.26
        143 |         21        0.21       99.47
        145 |         12        0.12       99.59
        147 |          3        0.03       99.62
        149 |          2        0.02       99.64
        150 |          1        0.01       99.65
        170 |         13        0.13       99.78
        180 |          1        0.01       99.79
        185 |          1        0.01       99.80
        188 |          1        0.01       99.81
        201 |          1        0.01       99.82
        240 |          2        0.02       99.84
        261 |          8        0.08       99.92
        270 |          2        0.02       99.94
        280 |          1        0.01       99.95
        290 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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