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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |        347        3.47        3.48
          3 |        169        1.69        5.17
          5 |        185        1.85        7.02
          7 |        119        1.19        8.21
          9 |        193        1.93       10.14
         11 |        273        2.73       12.87
         12 |         23        0.23       13.10
         13 |        534        5.34       18.44
         14 |          4        0.04       18.48
         15 |        124        1.24       19.72
         16 |          1        0.01       19.73
         17 |        113        1.13       20.86
         19 |        297        2.97       23.83
         20 |         25        0.25       24.08
         21 |        153        1.53       25.61
         23 |         71        0.71       26.32
         25 |        101        1.01       27.33
         27 |         50        0.50       27.83
         29 |        175        1.75       29.58
         31 |        245        2.45       32.03
         33 |         95        0.95       32.98
         35 |         58        0.58       33.56
         37 |        740        7.40       40.96
         39 |         71        0.71       41.67
         41 |         60        0.60       42.27
         43 |         55        0.55       42.82
         45 |         54        0.54       43.36
         47 |         53        0.53       43.89
         49 |         44        0.44       44.33
         51 |         62        0.62       44.95
         53 |         89        0.89       45.84
         55 |         67        0.67       46.51
         57 |        192        1.92       48.43
         59 |        231        2.31       50.74
         61 |         57        0.57       51.31
         63 |         45        0.45       51.76
         65 |        301        3.01       54.77
         67 |        147        1.47       56.24
         69 |        118        1.18       57.42
         71 |        443        4.43       61.85
         73 |        378        3.78       65.63
         75 |         79        0.79       66.42
         77 |        135        1.35       67.77
         79 |         77        0.77       68.54
         81 |        102        1.02       69.56
         83 |        138        1.38       70.94
         85 |        141        1.41       72.35
         86 |        276        2.76       75.11
         87 |         67        0.67       75.78
         89 |         87        0.87       76.65
         90 |         18        0.18       76.83
         91 |         40        0.40       77.23
         93 |         59        0.59       77.82
         95 |        229        2.29       80.11
         97 |        195        1.95       82.06
         99 |        271        2.71       84.77
        101 |        170        1.70       86.47
        103 |        142        1.42       87.89
        105 |        111        1.11       89.00
        107 |        119        1.19       90.19
        109 |         59        0.59       90.78
        110 |          1        0.01       90.79
        111 |        129        1.29       92.08
        113 |         70        0.70       92.78
        115 |         90        0.90       93.68
        117 |         81        0.81       94.49
        119 |         90        0.90       95.39
        121 |         38        0.38       95.77
        122 |          7        0.07       95.84
        123 |         72        0.72       96.56
        125 |         58        0.58       97.14
        127 |        123        1.23       98.37
        129 |         12        0.12       98.49
        130 |          2        0.02       98.51
        131 |         41        0.41       98.92
        133 |         17        0.17       99.09
        135 |          8        0.08       99.17
        137 |          3        0.03       99.20
        139 |          2        0.02       99.22
        141 |          9        0.09       99.31
        143 |         19        0.19       99.50
        145 |         21        0.21       99.71
        147 |          2        0.02       99.73
        149 |          6        0.06       99.79
        164 |          1        0.01       99.80
        170 |          9        0.09       99.89
        201 |          1        0.01       99.90
        240 |          3        0.03       99.93
        261 |          2        0.02       99.95
        270 |          2        0.02       99.97
        290 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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