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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        260        2.60        2.60
          3 |        178        1.78        4.38
          5 |        166        1.66        6.04
          7 |        124        1.24        7.28
          9 |         83        0.83        8.11
         11 |         13        0.13        8.24
         12 |         44        0.44        8.68
         13 |        873        8.73       17.41
         15 |        196        1.96       19.37
         17 |        101        1.01       20.38
         19 |        457        4.57       24.95
         20 |        121        1.21       26.16
         21 |        132        1.32       27.48
         23 |        110        1.10       28.58
         25 |        146        1.46       30.04
         27 |         78        0.78       30.82
         29 |        205        2.05       32.87
         31 |         54        0.54       33.41
         33 |         36        0.36       33.77
         35 |         53        0.53       34.30
         37 |      1,162       11.62       45.92
         39 |         69        0.69       46.61
         40 |          3        0.03       46.64
         41 |         30        0.30       46.94
         43 |         92        0.92       47.86
         45 |         56        0.56       48.42
         47 |        108        1.08       49.50
         49 |         35        0.35       49.85
         50 |          4        0.04       49.89
         51 |         77        0.77       50.66
         53 |        134        1.34       52.00
         55 |         59        0.59       52.59
         57 |         30        0.30       52.89
         59 |        270        2.70       55.59
         61 |         47        0.47       56.06
         63 |         38        0.38       56.44
         65 |        191        1.91       58.35
         67 |        179        1.79       60.14
         69 |         73        0.73       60.87
         70 |          3        0.03       60.90
         71 |        304        3.04       63.94
         73 |        521        5.21       69.15
         75 |         67        0.67       69.82
         77 |        155        1.55       71.37
         79 |         39        0.39       71.76
         80 |          3        0.03       71.79
         81 |        116        1.16       72.95
         83 |         90        0.90       73.85
         85 |        192        1.92       75.77
         87 |         53        0.53       76.30
         89 |        125        1.25       77.55
         90 |         33        0.33       77.88
         91 |         94        0.94       78.82
         93 |         88        0.88       79.70
         95 |         81        0.81       80.51
         97 |        255        2.55       83.06
         99 |         90        0.90       83.96
        100 |          3        0.03       83.99
        101 |        116        1.16       85.15
        103 |         78        0.78       85.93
        105 |         34        0.34       86.27
        107 |        143        1.43       87.70
        109 |         44        0.44       88.14
        110 |         17        0.17       88.31
        111 |        200        2.00       90.31
        113 |         90        0.90       91.21
        115 |         58        0.58       91.79
        117 |         38        0.38       92.17
        119 |        119        1.19       93.36
        120 |         39        0.39       93.75
        121 |         49        0.49       94.24
        123 |         44        0.44       94.68
        125 |         65        0.65       95.33
        127 |         56        0.56       95.89
        129 |         32        0.32       96.21
        130 |          6        0.06       96.27
        131 |         21        0.21       96.48
        133 |         45        0.45       96.93
        135 |         26        0.26       97.19
        137 |          1        0.01       97.20
        139 |         38        0.38       97.58
        140 |          2        0.02       97.60
        141 |          2        0.02       97.62
        143 |         68        0.68       98.30
        145 |         27        0.27       98.57
        147 |         15        0.15       98.72
        149 |          9        0.09       98.81
        150 |         11        0.11       98.92
        170 |         45        0.45       99.37
        180 |          8        0.08       99.45
        190 |          5        0.05       99.50
        210 |          5        0.05       99.55
        220 |          3        0.03       99.58
        230 |          2        0.02       99.60
        240 |          9        0.09       99.69
        250 |         10        0.10       99.79
        260 |          8        0.08       99.87
        270 |          1        0.01       99.88
        290 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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