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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          3        0.03        0.03
          1 |        352        3.52        3.55
          3 |        223        2.23        5.78
          5 |        189        1.89        7.67
          7 |        106        1.06        8.73
          9 |        199        1.99       10.72
         11 |        212        2.12       12.84
         12 |         21        0.21       13.05
         13 |        569        5.69       18.74
         14 |          8        0.08       18.82
         15 |        119        1.19       20.01
         17 |        114        1.14       21.15
         19 |        334        3.34       24.49
         20 |         32        0.32       24.81
         21 |        145        1.45       26.26
         23 |         61        0.61       26.87
         25 |        106        1.06       27.93
         27 |         64        0.64       28.57
         29 |        169        1.69       30.26
         31 |        212        2.12       32.38
         33 |         79        0.79       33.17
         35 |         66        0.66       33.83
         37 |        704        7.04       40.87
         39 |         62        0.62       41.49
         41 |         77        0.77       42.26
         43 |         60        0.60       42.86
         45 |         48        0.48       43.34
         47 |         81        0.81       44.15
         49 |         36        0.36       44.51
         50 |          1        0.01       44.52
         51 |         48        0.48       45.00
         53 |         90        0.90       45.90
         55 |         80        0.80       46.70
         57 |        229        2.29       48.99
         59 |        242        2.42       51.41
         61 |         66        0.66       52.07
         63 |         50        0.50       52.57
         65 |        297        2.97       55.54
         67 |        154        1.54       57.08
         69 |        121        1.21       58.29
         71 |        386        3.86       62.15
         73 |        399        3.99       66.14
         75 |         65        0.65       66.79
         77 |        177        1.77       68.56
         79 |         56        0.56       69.12
         81 |        108        1.08       70.20
         83 |        139        1.39       71.59
         85 |        152        1.52       73.11
         86 |        290        2.90       76.01
         87 |         59        0.59       76.60
         89 |         88        0.88       77.48
         90 |          4        0.04       77.52
         91 |         45        0.45       77.97
         93 |         45        0.45       78.42
         95 |        195        1.95       80.37
         97 |        185        1.85       82.22
         99 |        260        2.60       84.82
        101 |        175        1.75       86.57
        103 |        152        1.52       88.09
        105 |        117        1.17       89.26
        107 |        124        1.24       90.50
        109 |         57        0.57       91.07
        110 |          4        0.04       91.11
        111 |        117        1.17       92.28
        113 |         61        0.61       92.89
        115 |         95        0.95       93.84
        117 |         60        0.60       94.44
        119 |         70        0.70       95.14
        121 |         43        0.43       95.57
        122 |         11        0.11       95.68
        123 |         82        0.82       96.50
        125 |         58        0.58       97.08
        127 |        119        1.19       98.27
        129 |         15        0.15       98.42
        130 |          1        0.01       98.43
        131 |         30        0.30       98.73
        133 |         12        0.12       98.85
        135 |          3        0.03       98.88
        137 |          3        0.03       98.91
        139 |         13        0.13       99.04
        141 |          5        0.05       99.09
        143 |         34        0.34       99.43
        145 |         15        0.15       99.58
        147 |          5        0.05       99.63
        149 |         10        0.10       99.73
        150 |          1        0.01       99.74
        164 |          1        0.01       99.75
        170 |         11        0.11       99.86
        180 |          2        0.02       99.88
        188 |          1        0.01       99.89
        220 |          1        0.01       99.90
        232 |          1        0.01       99.91
        240 |          3        0.03       99.94
        261 |          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