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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         20        0.20        0.20
          1 |        221        2.21        2.41
          3 |        149        1.49        3.90
          5 |        198        1.98        5.88
          7 |        175        1.75        7.63
          9 |        101        1.01        8.64
         11 |         16        0.16        8.80
         12 |        101        1.01        9.81
         13 |      1,251       12.51       22.32
         15 |        211        2.11       24.43
         16 |          2        0.02       24.45
         17 |        105        1.05       25.50
         19 |        463        4.63       30.13
         20 |         59        0.59       30.72
         21 |        240        2.40       33.12
         23 |         49        0.49       33.61
         25 |        295        2.95       36.56
         27 |        117        1.17       37.73
         29 |        177        1.77       39.50
         31 |         81        0.81       40.31
         33 |         45        0.45       40.76
         35 |         78        0.78       41.54
         37 |        628        6.28       47.82
         39 |         78        0.78       48.60
         41 |         12        0.12       48.72
         43 |         69        0.69       49.41
         45 |         83        0.83       50.24
         47 |         81        0.81       51.05
         49 |         47        0.47       51.52
         51 |         81        0.81       52.33
         53 |         64        0.64       52.97
         55 |         92        0.92       53.89
         57 |         62        0.62       54.51
         59 |        183        1.83       56.34
         61 |         64        0.64       56.98
         63 |         32        0.32       57.30
         65 |        238        2.38       59.68
         67 |         98        0.98       60.66
         68 |          8        0.08       60.74
         69 |         97        0.97       61.71
         71 |        396        3.96       65.67
         73 |        544        5.44       71.11
         75 |         77        0.77       71.88
         77 |        104        1.04       72.92
         79 |         69        0.69       73.61
         81 |         87        0.87       74.48
         83 |         88        0.88       75.36
         85 |        154        1.54       76.90
         87 |         43        0.43       77.33
         89 |        151        1.51       78.84
         90 |         18        0.18       79.02
         91 |         56        0.56       79.58
         93 |         54        0.54       80.12
         95 |        124        1.24       81.36
         97 |        218        2.18       83.54
         99 |         36        0.36       83.90
        101 |        126        1.26       85.16
        103 |        103        1.03       86.19
        105 |         17        0.17       86.36
        107 |        152        1.52       87.88
        109 |         51        0.51       88.39
        110 |          7        0.07       88.46
        111 |         73        0.73       89.19
        113 |         74        0.74       89.93
        115 |         86        0.86       90.79
        117 |         78        0.78       91.57
        119 |        156        1.56       93.13
        121 |         80        0.80       93.93
        122 |         26        0.26       94.19
        123 |        105        1.05       95.24
        125 |        137        1.37       96.61
        127 |         48        0.48       97.09
        129 |         23        0.23       97.32
        131 |         45        0.45       97.77
        133 |         32        0.32       98.09
        135 |          9        0.09       98.18
        137 |          4        0.04       98.22
        139 |         34        0.34       98.56
        141 |         10        0.10       98.66
        143 |         58        0.58       99.24
        145 |         27        0.27       99.51
        147 |          6        0.06       99.57
        149 |         11        0.11       99.68
        170 |         27        0.27       99.95
        220 |          3        0.03       99.98
        999 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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