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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          3        0.03        0.03
          1 |        353        3.53        3.56
          3 |        195        1.95        5.51
          5 |        213        2.13        7.64
          7 |        115        1.15        8.79
          9 |        161        1.61       10.40
         11 |        218        2.18       12.58
         12 |         22        0.22       12.80
         13 |        520        5.20       18.00
         14 |          4        0.04       18.04
         15 |        122        1.22       19.26
         17 |        112        1.12       20.38
         19 |        312        3.12       23.50
         20 |         28        0.28       23.78
         21 |        151        1.51       25.29
         23 |         72        0.72       26.01
         25 |        131        1.31       27.32
         27 |         55        0.55       27.87
         29 |        139        1.39       29.26
         31 |        221        2.21       31.47
         33 |         77        0.77       32.24
         35 |         79        0.79       33.03
         37 |        731        7.31       40.34
         39 |         75        0.75       41.09
         41 |         78        0.78       41.87
         43 |         59        0.59       42.46
         45 |         45        0.45       42.91
         47 |         79        0.79       43.70
         49 |         38        0.38       44.08
         51 |         65        0.65       44.73
         53 |        121        1.21       45.94
         55 |         67        0.67       46.61
         57 |        179        1.79       48.40
         59 |        261        2.61       51.01
         61 |         66        0.66       51.67
         63 |         44        0.44       52.11
         65 |        311        3.11       55.22
         67 |        155        1.55       56.77
         68 |          2        0.02       56.79
         69 |        123        1.23       58.02
         71 |        454        4.54       62.56
         73 |        396        3.96       66.52
         75 |         65        0.65       67.17
         77 |        154        1.54       68.71
         79 |         73        0.73       69.44
         81 |        124        1.24       70.68
         83 |        152        1.52       72.20
         85 |        150        1.50       73.70
         86 |        237        2.37       76.07
         87 |         68        0.68       76.75
         89 |         84        0.84       77.59
         90 |          9        0.09       77.68
         91 |         27        0.27       77.95
         93 |         52        0.52       78.47
         95 |        210        2.10       80.57
         97 |        180        1.80       82.37
         99 |        221        2.21       84.58
        100 |          1        0.01       84.59
        101 |        151        1.51       86.10
        103 |        135        1.35       87.45
        105 |        132        1.32       88.77
        107 |        119        1.19       89.96
        109 |         59        0.59       90.55
        110 |          3        0.03       90.58
        111 |        113        1.13       91.71
        113 |         59        0.59       92.30
        115 |         85        0.85       93.15
        117 |         85        0.85       94.00
        119 |         68        0.68       94.68
        121 |         39        0.39       95.07
        122 |         15        0.15       95.22
        123 |         92        0.92       96.14
        125 |         67        0.67       96.81
        127 |        132        1.32       98.13
        129 |          7        0.07       98.20
        130 |          1        0.01       98.21
        131 |         32        0.32       98.53
        133 |         25        0.25       98.78
        135 |          8        0.08       98.86
        137 |          5        0.05       98.91
        139 |         13        0.13       99.04
        141 |          9        0.09       99.13
        143 |         30        0.30       99.43
        145 |         15        0.15       99.58
        147 |          3        0.03       99.61
        149 |          3        0.03       99.64
        164 |          1        0.01       99.65
        170 |         20        0.20       99.85
        185 |          2        0.02       99.87
        188 |          1        0.01       99.88
        201 |          1        0.01       99.89
        220 |          1        0.01       99.90
        240 |          4        0.04       99.94
        261 |          3        0.03       99.97
        280 |          1        0.01       99.98
        282 |          1        0.01       99.99
        999 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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