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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          1        0.01        0.01
          1 |        387        3.87        3.88
          3 |        203        2.03        5.91
          5 |        176        1.76        7.67
          7 |        108        1.08        8.75
          9 |        206        2.06       10.81
         11 |        172        1.72       12.53
         12 |         20        0.20       12.73
         13 |        484        4.84       17.57
         15 |        130        1.30       18.87
         17 |         86        0.86       19.73
         19 |        278        2.78       22.51
         20 |         27        0.27       22.78
         21 |        133        1.33       24.11
         23 |         52        0.52       24.63
         25 |        296        2.96       27.59
         27 |         55        0.55       28.14
         29 |        170        1.70       29.84
         31 |        187        1.87       31.71
         33 |         72        0.72       32.43
         35 |         69        0.69       33.12
         37 |      1,113       11.13       44.25
         39 |         76        0.76       45.01
         41 |         82        0.82       45.83
         43 |         38        0.38       46.21
         45 |         56        0.56       46.77
         47 |         90        0.90       47.67
         49 |         31        0.31       47.98
         50 |          2        0.02       48.00
         51 |         49        0.49       48.49
         53 |        111        1.11       49.60
         55 |         68        0.68       50.28
         57 |        155        1.55       51.83
         59 |        344        3.44       55.27
         61 |         79        0.79       56.06
         63 |         35        0.35       56.41
         65 |        354        3.54       59.95
         67 |        156        1.56       61.51
         69 |         94        0.94       62.45
         71 |        471        4.71       67.16
         73 |        531        5.31       72.47
         74 |          1        0.01       72.48
         75 |         77        0.77       73.25
         77 |        166        1.66       74.91
         79 |         54        0.54       75.45
         81 |        107        1.07       76.52
         83 |        105        1.05       77.57
         85 |        173        1.73       79.30
         87 |         64        0.64       79.94
         89 |        107        1.07       81.01
         90 |         11        0.11       81.12
         91 |         25        0.25       81.37
         93 |         63        0.63       82.00
         95 |        145        1.45       83.45
         97 |        168        1.68       85.13
         99 |        196        1.96       87.09
        100 |          2        0.02       87.11
        101 |        114        1.14       88.25
        103 |        108        1.08       89.33
        105 |        100        1.00       90.33
        107 |        155        1.55       91.88
        109 |         44        0.44       92.32
        110 |          1        0.01       92.33
        111 |        145        1.45       93.78
        113 |         59        0.59       94.37
        115 |         77        0.77       95.14
        117 |         49        0.49       95.63
        119 |         66        0.66       96.29
        121 |         29        0.29       96.58
        122 |         12        0.12       96.70
        123 |         50        0.50       97.20
        125 |         51        0.51       97.71
        127 |         67        0.67       98.38
        129 |         16        0.16       98.54
        130 |          1        0.01       98.55
        131 |         25        0.25       98.80
        133 |         19        0.19       98.99
        135 |          3        0.03       99.02
        137 |          3        0.03       99.05
        138 |          1        0.01       99.06
        139 |         12        0.12       99.18
        141 |          3        0.03       99.21
        143 |         24        0.24       99.45
        145 |         18        0.18       99.63
        147 |          3        0.03       99.66
        149 |         10        0.10       99.76
        170 |         12        0.12       99.88
        180 |          1        0.01       99.89
        185 |          1        0.01       99.90
        188 |          1        0.01       99.91
        231 |          1        0.01       99.92
        240 |          2        0.02       99.94
        261 |          5        0.05       99.99
        280 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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