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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        287        2.87        2.87
          3 |        153        1.53        4.40
          5 |        177        1.77        6.17
          7 |        125        1.25        7.42
          9 |         74        0.74        8.16
         11 |         26        0.26        8.42
         13 |        880        8.80       17.22
         15 |        163        1.63       18.85
         17 |        161        1.61       20.46
         19 |        460        4.60       25.06
         20 |         87        0.87       25.93
         21 |        142        1.42       27.35
         23 |         55        0.55       27.90
         25 |        174        1.74       29.64
         27 |        133        1.33       30.97
         29 |        200        2.00       32.97
         31 |        119        1.19       34.16
         33 |         78        0.78       34.94
         35 |         68        0.68       35.62
         37 |      1,034       10.34       45.96
         39 |         81        0.81       46.77
         40 |          4        0.04       46.81
         41 |         72        0.72       47.53
         43 |         27        0.27       47.80
         45 |         80        0.80       48.60
         47 |        162        1.62       50.22
         49 |         50        0.50       50.72
         50 |          3        0.03       50.75
         51 |         76        0.76       51.51
         53 |        135        1.35       52.86
         55 |         91        0.91       53.77
         57 |         25        0.25       54.02
         59 |        208        2.08       56.10
         61 |         64        0.64       56.74
         63 |         46        0.46       57.20
         65 |        222        2.22       59.42
         67 |        191        1.91       61.33
         69 |        104        1.04       62.37
         71 |        246        2.46       64.83
         73 |        603        6.03       70.86
         75 |        110        1.10       71.96
         77 |        117        1.17       73.13
         79 |         56        0.56       73.69
         80 |          1        0.01       73.70
         81 |         96        0.96       74.66
         83 |         85        0.85       75.51
         85 |        276        2.76       78.27
         87 |         83        0.83       79.10
         89 |        105        1.05       80.15
         90 |         27        0.27       80.42
         91 |         54        0.54       80.96
         93 |         97        0.97       81.93
         95 |        100        1.00       82.93
         97 |        221        2.21       85.14
         99 |         90        0.90       86.04
        100 |          5        0.05       86.09
        101 |         87        0.87       86.96
        103 |         91        0.91       87.87
        105 |         18        0.18       88.05
        107 |         97        0.97       89.02
        109 |         69        0.69       89.71
        110 |          9        0.09       89.80
        111 |        117        1.17       90.97
        113 |         99        0.99       91.96
        115 |         30        0.30       92.26
        117 |         44        0.44       92.70
        119 |        135        1.35       94.05
        120 |          8        0.08       94.13
        121 |         44        0.44       94.57
        123 |         42        0.42       94.99
        125 |         82        0.82       95.81
        127 |         42        0.42       96.23
        129 |         41        0.41       96.64
        130 |          4        0.04       96.68
        131 |         44        0.44       97.12
        133 |         32        0.32       97.44
        135 |          9        0.09       97.53
        137 |          4        0.04       97.57
        139 |         21        0.21       97.78
        141 |         17        0.17       97.95
        143 |         56        0.56       98.51
        145 |         28        0.28       98.79
        147 |          5        0.05       98.84
        149 |         11        0.11       98.95
        150 |          7        0.07       99.02
        160 |          2        0.02       99.04
        170 |         11        0.11       99.15
        180 |          7        0.07       99.22
        210 |         15        0.15       99.37
        240 |         12        0.12       99.49
        250 |          2        0.02       99.51
        260 |         18        0.18       99.69
        270 |          1        0.01       99.70
        280 |          4        0.04       99.74
        290 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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