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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |        451        4.51        4.52
          3 |        232        2.32        6.84
          5 |        182        1.82        8.66
          7 |        113        1.13        9.79
          9 |        198        1.98       11.77
         10 |          1        0.01       11.78
         11 |        193        1.93       13.71
         13 |        526        5.26       18.97
         15 |        109        1.09       20.06
         17 |        117        1.17       21.23
         19 |        322        3.22       24.45
         20 |         25        0.25       24.70
         21 |        104        1.04       25.74
         23 |         66        0.66       26.40
         25 |        268        2.68       29.08
         27 |         84        0.84       29.92
         29 |        176        1.76       31.68
         31 |        190        1.90       33.58
         33 |         56        0.56       34.14
         35 |         52        0.52       34.66
         37 |      1,288       12.88       47.54
         39 |         61        0.61       48.15
         40 |          1        0.01       48.16
         41 |         90        0.90       49.06
         43 |         33        0.33       49.39
         45 |         65        0.65       50.04
         47 |         62        0.62       50.66
         49 |         35        0.35       51.01
         50 |          1        0.01       51.02
         51 |         57        0.57       51.59
         53 |        104        1.04       52.63
         55 |         70        0.70       53.33
         57 |        137        1.37       54.70
         59 |        347        3.47       58.17
         61 |         57        0.57       58.74
         63 |         42        0.42       59.16
         65 |        232        2.32       61.48
         67 |        186        1.86       63.34
         69 |         97        0.97       64.31
         70 |          2        0.02       64.33
         71 |        341        3.41       67.74
         73 |        494        4.94       72.68
         75 |         92        0.92       73.60
         77 |        161        1.61       75.21
         79 |         64        0.64       75.85
         81 |        156        1.56       77.41
         83 |        113        1.13       78.54
         85 |        249        2.49       81.03
         87 |         66        0.66       81.69
         88 |          1        0.01       81.70
         89 |         92        0.92       82.62
         90 |          9        0.09       82.71
         91 |         33        0.33       83.04
         93 |         51        0.51       83.55
         95 |        121        1.21       84.76
         97 |        181        1.81       86.57
         98 |          1        0.01       86.58
         99 |        182        1.82       88.40
        101 |        115        1.15       89.55
        102 |          1        0.01       89.56
        103 |        107        1.07       90.63
        105 |         94        0.94       91.57
        107 |        114        1.14       92.71
        109 |         46        0.46       93.17
        111 |        123        1.23       94.40
        113 |         49        0.49       94.89
        115 |         56        0.56       95.45
        117 |         53        0.53       95.98
        119 |         65        0.65       96.63
        120 |         12        0.12       96.75
        121 |         24        0.24       96.99
        123 |         46        0.46       97.45
        125 |         50        0.50       97.95
        127 |         75        0.75       98.70
        129 |         13        0.13       98.83
        130 |          2        0.02       98.85
        131 |         25        0.25       99.10
        133 |         14        0.14       99.24
        135 |          4        0.04       99.28
        137 |          2        0.02       99.30
        139 |         10        0.10       99.40
        140 |          1        0.01       99.41
        141 |          4        0.04       99.45
        143 |         14        0.14       99.59
        145 |          8        0.08       99.67
        147 |          2        0.02       99.69
        149 |          1        0.01       99.70
        150 |          5        0.05       99.75
        170 |          7        0.07       99.82
        180 |          3        0.03       99.85
        220 |          1        0.01       99.86
        230 |          1        0.01       99.87
        240 |          2        0.02       99.89
        250 |          1        0.01       99.90
        260 |          4        0.04       99.94
        290 |          1        0.01       99.95
        997 |          3        0.03       99.98
        999 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016