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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          7        0.07        0.07
          1 |        353        3.53        3.60
          3 |        230        2.30        5.90
          5 |        192        1.92        7.82
          7 |         90        0.90        8.72
          9 |        202        2.02       10.74
         11 |        223        2.23       12.97
         12 |         33        0.33       13.30
         13 |        539        5.39       18.69
         14 |          5        0.05       18.74
         15 |        135        1.35       20.09
         17 |        117        1.17       21.26
         19 |        311        3.11       24.37
         20 |         24        0.24       24.61
         21 |        152        1.52       26.13
         23 |         69        0.69       26.82
         25 |        105        1.05       27.87
         27 |         54        0.54       28.41
         29 |        183        1.83       30.24
         31 |        208        2.08       32.32
         33 |         75        0.75       33.07
         35 |         62        0.62       33.69
         37 |        742        7.42       41.11
         39 |         66        0.66       41.77
         41 |         88        0.88       42.65
         43 |         48        0.48       43.13
         45 |         62        0.62       43.75
         47 |         70        0.70       44.45
         49 |         34        0.34       44.79
         50 |          1        0.01       44.80
         51 |         54        0.54       45.34
         53 |        101        1.01       46.35
         55 |         58        0.58       46.93
         57 |        216        2.16       49.09
         59 |        265        2.65       51.74
         61 |         79        0.79       52.53
         63 |         47        0.47       53.00
         65 |        293        2.93       55.93
         67 |        160        1.60       57.53
         69 |        134        1.34       58.87
         70 |          3        0.03       58.90
         71 |        438        4.38       63.28
         73 |        383        3.83       67.11
         75 |         67        0.67       67.78
         77 |        124        1.24       69.02
         79 |         51        0.51       69.53
         81 |        121        1.21       70.74
         83 |        154        1.54       72.28
         85 |        135        1.35       73.63
         86 |        270        2.70       76.33
         87 |         73        0.73       77.06
         89 |         83        0.83       77.89
         90 |          7        0.07       77.96
         91 |         53        0.53       78.49
         93 |         53        0.53       79.02
         95 |        207        2.07       81.09
         97 |        183        1.83       82.92
         99 |        268        2.68       85.60
        101 |        144        1.44       87.04
        103 |        124        1.24       88.28
        105 |        103        1.03       89.31
        107 |        117        1.17       90.48
        109 |         70        0.70       91.18
        110 |          2        0.02       91.20
        111 |        120        1.20       92.40
        113 |         70        0.70       93.10
        115 |        104        1.04       94.14
        117 |         50        0.50       94.64
        119 |         57        0.57       95.21
        121 |         47        0.47       95.68
        122 |         14        0.14       95.82
        123 |         77        0.77       96.59
        125 |         39        0.39       96.98
        127 |        101        1.01       97.99
        129 |         22        0.22       98.21
        131 |         41        0.41       98.62
        133 |         16        0.16       98.78
        135 |          5        0.05       98.83
        137 |          6        0.06       98.89
        139 |         15        0.15       99.04
        141 |          7        0.07       99.11
        143 |         27        0.27       99.38
        145 |         19        0.19       99.57
        147 |          2        0.02       99.59
        149 |          5        0.05       99.64
        170 |         24        0.24       99.88
        180 |          1        0.01       99.89
        220 |          1        0.01       99.90
        240 |          3        0.03       99.93
        261 |          1        0.01       99.94
        280 |          1        0.01       99.95
        290 |          3        0.03       99.98
        999 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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