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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |        325        3.25        3.27
          3 |        228        2.28        5.55
          5 |        221        2.21        7.76
          7 |        110        1.10        8.86
          9 |        173        1.73       10.59
         11 |        225        2.25       12.84
         12 |         24        0.24       13.08
         13 |        635        6.35       19.43
         15 |        147        1.47       20.90
         16 |          1        0.01       20.91
         17 |        118        1.18       22.09
         19 |        305        3.05       25.14
         20 |         20        0.20       25.34
         21 |        167        1.67       27.01
         23 |         67        0.67       27.68
         25 |        108        1.08       28.76
         27 |         62        0.62       29.38
         29 |        198        1.98       31.36
         31 |        202        2.02       33.38
         33 |         75        0.75       34.13
         35 |         68        0.68       34.81
         37 |        769        7.69       42.50
         39 |         75        0.75       43.25
         41 |         46        0.46       43.71
         43 |         56        0.56       44.27
         45 |         53        0.53       44.80
         47 |         74        0.74       45.54
         49 |         30        0.30       45.84
         51 |         63        0.63       46.47
         53 |         90        0.90       47.37
         55 |         63        0.63       48.00
         57 |        173        1.73       49.73
         59 |        259        2.59       52.32
         60 |          1        0.01       52.33
         61 |         65        0.65       52.98
         63 |         43        0.43       53.41
         65 |        337        3.37       56.78
         67 |        140        1.40       58.18
         68 |          3        0.03       58.21
         69 |        101        1.01       59.22
         71 |        483        4.83       64.05
         73 |        381        3.81       67.86
         75 |         61        0.61       68.47
         77 |        147        1.47       69.94
         79 |         54        0.54       70.48
         81 |        105        1.05       71.53
         83 |        125        1.25       72.78
         85 |        143        1.43       74.21
         86 |        227        2.27       76.48
         87 |         57        0.57       77.05
         89 |        109        1.09       78.14
         90 |         11        0.11       78.25
         91 |         47        0.47       78.72
         93 |         59        0.59       79.31
         95 |        195        1.95       81.26
         97 |        198        1.98       83.24
         99 |        231        2.31       85.55
        101 |        145        1.45       87.00
        103 |        147        1.47       88.47
        105 |        113        1.13       89.60
        107 |        118        1.18       90.78
        109 |         50        0.50       91.28
        110 |          1        0.01       91.29
        111 |        124        1.24       92.53
        113 |         74        0.74       93.27
        115 |         72        0.72       93.99
        117 |         57        0.57       94.56
        119 |         87        0.87       95.43
        121 |         52        0.52       95.95
        122 |         11        0.11       96.06
        123 |         57        0.57       96.63
        125 |         57        0.57       97.20
        127 |        111        1.11       98.31
        129 |         13        0.13       98.44
        130 |          1        0.01       98.45
        131 |         36        0.36       98.81
        133 |         22        0.22       99.03
        135 |          6        0.06       99.09
        137 |          2        0.02       99.11
        139 |          8        0.08       99.19
        141 |          5        0.05       99.24
        143 |         26        0.26       99.50
        145 |         19        0.19       99.69
        147 |          2        0.02       99.71
        149 |          8        0.08       99.79
        164 |          1        0.01       99.80
        170 |         11        0.11       99.91
        180 |          2        0.02       99.93
        185 |          2        0.02       99.95
        220 |          1        0.01       99.96
        240 |          1        0.01       99.97
        261 |          2        0.02       99.99
        290 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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