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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |        402        4.02        4.03
          3 |        243        2.43        6.46
          5 |        169        1.69        8.15
          7 |        119        1.19        9.34
          9 |        171        1.71       11.05
         10 |          2        0.02       11.07
         11 |        214        2.14       13.21
         13 |        517        5.17       18.38
         15 |         85        0.85       19.23
         17 |        112        1.12       20.35
         19 |        329        3.29       23.64
         20 |         34        0.34       23.98
         21 |        107        1.07       25.05
         23 |         48        0.48       25.53
         25 |        341        3.41       28.94
         27 |         84        0.84       29.78
         29 |        196        1.96       31.74
         31 |        192        1.92       33.66
         33 |         66        0.66       34.32
         35 |         67        0.67       34.99
         37 |      1,204       12.04       47.03
         39 |         48        0.48       47.51
         41 |         97        0.97       48.48
         43 |         36        0.36       48.84
         45 |         66        0.66       49.50
         47 |         57        0.57       50.07
         49 |         29        0.29       50.36
         51 |         44        0.44       50.80
         53 |        102        1.02       51.82
         55 |         62        0.62       52.44
         57 |        148        1.48       53.92
         59 |        323        3.23       57.15
         60 |          1        0.01       57.16
         61 |         54        0.54       57.70
         63 |         48        0.48       58.18
         65 |        230        2.30       60.48
         67 |        165        1.65       62.13
         69 |         96        0.96       63.09
         70 |          1        0.01       63.10
         71 |        361        3.61       66.71
         73 |        462        4.62       71.33
         75 |         79        0.79       72.12
         77 |        148        1.48       73.60
         79 |         60        0.60       74.20
         80 |          1        0.01       74.21
         81 |        121        1.21       75.42
         83 |        116        1.16       76.58
         85 |        249        2.49       79.07
         87 |         73        0.73       79.80
         89 |         81        0.81       80.61
         90 |         11        0.11       80.72
         91 |         50        0.50       81.22
         93 |         61        0.61       81.83
         95 |        149        1.49       83.32
         97 |        167        1.67       84.99
         99 |        191        1.91       86.90
        101 |        100        1.00       87.90
        103 |        122        1.22       89.12
        105 |         87        0.87       89.99
        107 |        121        1.21       91.20
        109 |         31        0.31       91.51
        110 |          2        0.02       91.53
        111 |        123        1.23       92.76
        113 |         57        0.57       93.33
        115 |         60        0.60       93.93
        117 |         37        0.37       94.30
        119 |         62        0.62       94.92
        120 |         12        0.12       95.04
        121 |         21        0.21       95.25
        123 |         58        0.58       95.83
        125 |         35        0.35       96.18
        127 |         71        0.71       96.89
        129 |         15        0.15       97.04
        131 |         21        0.21       97.25
        133 |         19        0.19       97.44
        135 |          5        0.05       97.49
        137 |          2        0.02       97.51
        139 |         13        0.13       97.64
        141 |          5        0.05       97.69
        143 |         21        0.21       97.90
        145 |          6        0.06       97.96
        147 |          4        0.04       98.00
        149 |          2        0.02       98.02
        150 |          2        0.02       98.04
        160 |          2        0.02       98.06
        170 |          6        0.06       98.12
        180 |          1        0.01       98.13
        200 |          1        0.01       98.14
        210 |          1        0.01       98.15
        220 |          1        0.01       98.16
        240 |          3        0.03       98.19
        250 |          3        0.03       98.22
        260 |          6        0.06       98.28
        999 |        172        1.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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