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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        442        4.42        4.42
          2 |          1        0.01        4.43
          3 |        276        2.76        7.19
          5 |        183        1.83        9.02
          7 |        130        1.30       10.32
          9 |        187        1.87       12.19
         10 |          1        0.01       12.20
         11 |        214        2.14       14.34
         13 |        502        5.02       19.36
         15 |        102        1.02       20.38
         17 |         78        0.78       21.16
         19 |        354        3.54       24.70
         20 |         28        0.28       24.98
         21 |         99        0.99       25.97
         22 |          1        0.01       25.98
         23 |         70        0.70       26.68
         25 |        309        3.09       29.77
         27 |         68        0.68       30.45
         29 |        188        1.88       32.33
         31 |        183        1.83       34.16
         33 |         74        0.74       34.90
         35 |         47        0.47       35.37
         37 |      1,221       12.21       47.58
         39 |         48        0.48       48.06
         40 |          1        0.01       48.07
         41 |         94        0.94       49.01
         43 |         30        0.30       49.31
         45 |         78        0.78       50.09
         47 |         59        0.59       50.68
         49 |         29        0.29       50.97
         51 |         49        0.49       51.46
         53 |         91        0.91       52.37
         55 |         75        0.75       53.12
         57 |        130        1.30       54.42
         59 |        352        3.52       57.94
         60 |          1        0.01       57.95
         61 |         62        0.62       58.57
         63 |         37        0.37       58.94
         65 |        245        2.45       61.39
         67 |        174        1.74       63.13
         69 |         89        0.89       64.02
         70 |          1        0.01       64.03
         71 |        388        3.88       67.91
         73 |        481        4.81       72.72
         75 |        106        1.06       73.78
         77 |        139        1.39       75.17
         79 |         55        0.55       75.72
         81 |        113        1.13       76.85
         83 |         94        0.94       77.79
         85 |        238        2.38       80.17
         87 |         78        0.78       80.95
         89 |         94        0.94       81.89
         90 |          5        0.05       81.94
         91 |         38        0.38       82.32
         93 |         48        0.48       82.80
         95 |        145        1.45       84.25
         97 |        218        2.18       86.43
         99 |        194        1.94       88.37
        100 |          1        0.01       88.38
        101 |         92        0.92       89.30
        103 |        114        1.14       90.44
        105 |         83        0.83       91.27
        107 |        121        1.21       92.48
        109 |         47        0.47       92.95
        111 |        148        1.48       94.43
        113 |         53        0.53       94.96
        115 |         53        0.53       95.49
        117 |         50        0.50       95.99
        119 |         61        0.61       96.60
        120 |          4        0.04       96.64
        121 |         32        0.32       96.96
        123 |         60        0.60       97.56
        125 |         35        0.35       97.91
        127 |         61        0.61       98.52
        129 |         15        0.15       98.67
        130 |          2        0.02       98.69
        131 |         18        0.18       98.87
        133 |         17        0.17       99.04
        135 |          5        0.05       99.09
        137 |          2        0.02       99.11
        139 |         11        0.11       99.22
        140 |          1        0.01       99.23
        141 |          2        0.02       99.25
        143 |         17        0.17       99.42
        145 |          8        0.08       99.50
        147 |          6        0.06       99.56
        149 |          3        0.03       99.59
        150 |          2        0.02       99.61
        160 |          1        0.01       99.62
        170 |          8        0.08       99.70
        180 |          2        0.02       99.72
        190 |          1        0.01       99.73
        203 |          1        0.01       99.74
        210 |          5        0.05       99.79
        220 |          3        0.03       99.82
        230 |          1        0.01       99.83
        240 |          2        0.02       99.85
        260 |          3        0.03       99.88
        290 |          6        0.06       99.94
        730 |          1        0.01       99.95
        997 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016