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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        216        2.16        2.16
          3 |        166        1.66        3.82
          5 |        126        1.26        5.08
          7 |        105        1.05        6.13
          9 |         93        0.93        7.06
         11 |         25        0.25        7.31
         12 |         40        0.40        7.71
         13 |        890        8.90       16.61
         15 |        177        1.77       18.38
         17 |        144        1.44       19.82
         19 |        456        4.56       24.38
         20 |         73        0.73       25.11
         21 |        211        2.11       27.22
         23 |         81        0.81       28.03
         25 |        188        1.88       29.91
         27 |         80        0.80       30.71
         29 |        296        2.96       33.67
         31 |        129        1.29       34.96
         33 |         74        0.74       35.70
         35 |         41        0.41       36.11
         37 |        977        9.77       45.88
         39 |         74        0.74       46.62
         41 |         22        0.22       46.84
         43 |         63        0.63       47.47
         45 |         69        0.69       48.16
         47 |        143        1.43       49.59
         49 |         42        0.42       50.01
         51 |         66        0.66       50.67
         53 |         83        0.83       51.50
         55 |         61        0.61       52.11
         57 |         56        0.56       52.67
         59 |        255        2.55       55.22
         61 |         50        0.50       55.72
         63 |         40        0.40       56.12
         65 |        367        3.67       59.79
         67 |        184        1.84       61.63
         68 |          1        0.01       61.64
         69 |         78        0.78       62.42
         70 |          5        0.05       62.47
         71 |        440        4.40       66.87
         73 |        529        5.29       72.16
         75 |         81        0.81       72.97
         77 |        154        1.54       74.51
         79 |         88        0.88       75.39
         81 |        112        1.12       76.51
         83 |        113        1.13       77.64
         85 |        132        1.32       78.96
         87 |         69        0.69       79.65
         89 |        136        1.36       81.01
         90 |          7        0.07       81.08
         91 |         50        0.50       81.58
         93 |         41        0.41       81.99
         95 |        124        1.24       83.23
         97 |        179        1.79       85.02
         99 |        128        1.28       86.30
        101 |         86        0.86       87.16
        103 |         56        0.56       87.72
        105 |         24        0.24       87.96
        107 |        154        1.54       89.50
        109 |         67        0.67       90.17
        110 |          9        0.09       90.26
        111 |         97        0.97       91.23
        113 |         52        0.52       91.75
        115 |         64        0.64       92.39
        117 |         56        0.56       92.95
        119 |        163        1.63       94.58
        121 |         71        0.71       95.29
        122 |         40        0.40       95.69
        123 |         49        0.49       96.18
        125 |        102        1.02       97.20
        127 |         35        0.35       97.55
        129 |          6        0.06       97.61
        130 |          1        0.01       97.62
        131 |         39        0.39       98.01
        133 |         16        0.16       98.17
        135 |          1        0.01       98.18
        137 |          4        0.04       98.22
        139 |         23        0.23       98.45
        141 |         12        0.12       98.57
        143 |         67        0.67       99.24
        145 |         26        0.26       99.50
        147 |          5        0.05       99.55
        149 |          9        0.09       99.64
        170 |         19        0.19       99.83
        180 |          6        0.06       99.89
        201 |          2        0.02       99.91
        261 |          3        0.03       99.94
        270 |          3        0.03       99.97
        290 |          1        0.01       99.98
        999 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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