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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          3        0.03        0.03
          1 |        271        2.71        2.74
          3 |        158        1.58        4.32
          5 |        130        1.30        5.62
          7 |        147        1.47        7.09
          9 |         64        0.64        7.73
         10 |          2        0.02        7.75
         11 |         33        0.33        8.08
         13 |      1,212       12.12       20.20
         15 |        166        1.66       21.86
         17 |        206        2.06       23.92
         19 |        572        5.72       29.64
         20 |         64        0.64       30.28
         21 |        196        1.96       32.24
         23 |         59        0.59       32.83
         25 |        130        1.30       34.13
         27 |        170        1.70       35.83
         29 |        110        1.10       36.93
         31 |         55        0.55       37.48
         33 |         63        0.63       38.11
         35 |         56        0.56       38.67
         37 |      1,018       10.18       48.85
         39 |         65        0.65       49.50
         40 |          1        0.01       49.51
         41 |         44        0.44       49.95
         43 |         41        0.41       50.36
         45 |         76        0.76       51.12
         47 |         91        0.91       52.03
         49 |         59        0.59       52.62
         50 |          1        0.01       52.63
         51 |        101        1.01       53.64
         53 |         98        0.98       54.62
         55 |         77        0.77       55.39
         57 |         37        0.37       55.76
         59 |        251        2.51       58.27
         61 |         48        0.48       58.75
         63 |         41        0.41       59.16
         65 |        173        1.73       60.89
         67 |        173        1.73       62.62
         69 |         76        0.76       63.38
         70 |          2        0.02       63.40
         71 |        316        3.16       66.56
         73 |        574        5.74       72.30
         75 |         81        0.81       73.11
         77 |        116        1.16       74.27
         79 |         76        0.76       75.03
         81 |        161        1.61       76.64
         83 |         91        0.91       77.55
         85 |        182        1.82       79.37
         87 |         55        0.55       79.92
         89 |        130        1.30       81.22
         90 |         21        0.21       81.43
         91 |         31        0.31       81.74
         93 |         49        0.49       82.23
         95 |         75        0.75       82.98
         97 |        254        2.54       85.52
         99 |        101        1.01       86.53
        101 |        102        1.02       87.55
        103 |         92        0.92       88.47
        105 |         24        0.24       88.71
        107 |         86        0.86       89.57
        109 |         25        0.25       89.82
        111 |         85        0.85       90.67
        113 |         50        0.50       91.17
        115 |         58        0.58       91.75
        117 |         75        0.75       92.50
        119 |        159        1.59       94.09
        120 |         32        0.32       94.41
        121 |         51        0.51       94.92
        123 |         32        0.32       95.24
        125 |         93        0.93       96.17
        127 |         69        0.69       96.86
        129 |         31        0.31       97.17
        130 |          4        0.04       97.21
        131 |         60        0.60       97.81
        133 |         29        0.29       98.10
        135 |         19        0.19       98.29
        137 |          5        0.05       98.34
        139 |         26        0.26       98.60
        140 |          3        0.03       98.63
        141 |         11        0.11       98.74
        143 |         37        0.37       99.11
        145 |         23        0.23       99.34
        147 |          4        0.04       99.38
        149 |          6        0.06       99.44
        150 |         12        0.12       99.56
        170 |         19        0.19       99.75
        180 |          6        0.06       99.81
        220 |          2        0.02       99.83
        230 |          1        0.01       99.84
        240 |          3        0.03       99.87
        250 |          3        0.03       99.90
        260 |          8        0.08       99.98
        290 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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