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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          2        0.02        0.02
          1 |        389        3.89        3.91
          3 |        197        1.97        5.88
          5 |        186        1.86        7.74
          7 |        140        1.40        9.14
          9 |        224        2.24       11.38
         11 |        176        1.76       13.14
         12 |         19        0.19       13.33
         13 |        501        5.01       18.34
         15 |        116        1.16       19.50
         17 |        123        1.23       20.73
         19 |        314        3.14       23.87
         20 |         26        0.26       24.13
         21 |         95        0.95       25.08
         23 |         57        0.57       25.65
         25 |        264        2.64       28.29
         27 |         55        0.55       28.84
         29 |        198        1.98       30.82
         31 |        181        1.81       32.63
         33 |        100        1.00       33.63
         35 |         47        0.47       34.10
         37 |      1,138       11.38       45.48
         39 |         62        0.62       46.10
         41 |         93        0.93       47.03
         43 |         47        0.47       47.50
         45 |         67        0.67       48.17
         47 |         80        0.80       48.97
         49 |         34        0.34       49.31
         51 |         57        0.57       49.88
         53 |        114        1.14       51.02
         55 |         77        0.77       51.79
         57 |        157        1.57       53.36
         59 |        345        3.45       56.81
         60 |          1        0.01       56.82
         61 |         59        0.59       57.41
         63 |         39        0.39       57.80
         65 |        274        2.74       60.54
         67 |        177        1.77       62.31
         69 |        109        1.09       63.40
         70 |          1        0.01       63.41
         71 |        382        3.82       67.23
         73 |        473        4.73       71.96
         75 |         69        0.69       72.65
         77 |        141        1.41       74.06
         79 |         61        0.61       74.67
         81 |        115        1.15       75.82
         83 |        121        1.21       77.03
         85 |        171        1.71       78.74
         87 |         85        0.85       79.59
         88 |          1        0.01       79.60
         89 |         93        0.93       80.53
         90 |         13        0.13       80.66
         91 |         44        0.44       81.10
         93 |         66        0.66       81.76
         95 |        139        1.39       83.15
         97 |        205        2.05       85.20
         99 |        206        2.06       87.26
        100 |          1        0.01       87.27
        101 |        121        1.21       88.48
        103 |        137        1.37       89.85
        105 |         91        0.91       90.76
        107 |        107        1.07       91.83
        109 |         50        0.50       92.33
        110 |          2        0.02       92.35
        111 |        139        1.39       93.74
        113 |         56        0.56       94.30
        115 |         68        0.68       94.98
        117 |         50        0.50       95.48
        119 |         62        0.62       96.10
        121 |         32        0.32       96.42
        122 |         14        0.14       96.56
        123 |         57        0.57       97.13
        125 |         45        0.45       97.58
        127 |         90        0.90       98.48
        129 |          8        0.08       98.56
        131 |         38        0.38       98.94
        133 |         23        0.23       99.17
        135 |          4        0.04       99.21
        137 |          1        0.01       99.22
        139 |          9        0.09       99.31
        141 |          2        0.02       99.33
        143 |         16        0.16       99.49
        145 |          7        0.07       99.56
        147 |          3        0.03       99.59
        149 |          8        0.08       99.67
        150 |          2        0.02       99.69
        170 |         16        0.16       99.85
        199 |          1        0.01       99.86
        220 |          2        0.02       99.88
        231 |          2        0.02       99.90
        240 |          1        0.01       99.91
        261 |          4        0.04       99.95
        280 |          2        0.02       99.97
        499 |          1        0.01       99.98
        941 |          1        0.01       99.99
        981 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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