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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          7        0.07        0.07
          1 |        258        2.58        2.65
          3 |        117        1.17        3.82
          5 |        197        1.97        5.79
          7 |        156        1.56        7.35
          9 |         93        0.93        8.28
         11 |         28        0.28        8.56
         12 |         52        0.52        9.08
         13 |      1,114       11.14       20.22
         15 |        198        1.98       22.20
         17 |        203        2.03       24.23
         19 |        541        5.41       29.64
         20 |         67        0.67       30.31
         21 |        231        2.31       32.62
         23 |         63        0.63       33.25
         25 |        146        1.46       34.71
         27 |        111        1.11       35.82
         29 |        162        1.62       37.44
         31 |         45        0.45       37.89
         33 |         86        0.86       38.75
         35 |         98        0.98       39.73
         37 |        860        8.60       48.33
         39 |         37        0.37       48.70
         41 |         50        0.50       49.20
         43 |         74        0.74       49.94
         45 |         74        0.74       50.68
         47 |        115        1.15       51.83
         49 |         66        0.66       52.49
         51 |         80        0.80       53.29
         53 |        103        1.03       54.32
         55 |         90        0.90       55.22
         57 |         40        0.40       55.62
         59 |        223        2.23       57.85
         60 |          4        0.04       57.89
         61 |         36        0.36       58.25
         63 |         29        0.29       58.54
         65 |        220        2.20       60.74
         67 |        145        1.45       62.19
         69 |         99        0.99       63.18
         70 |          2        0.02       63.20
         71 |        278        2.78       65.98
         73 |        514        5.14       71.12
         75 |         46        0.46       71.58
         77 |         80        0.80       72.38
         79 |         57        0.57       72.95
         81 |        120        1.20       74.15
         83 |         75        0.75       74.90
         85 |        167        1.67       76.57
         87 |         58        0.58       77.15
         89 |        155        1.55       78.70
         90 |         41        0.41       79.11
         91 |         65        0.65       79.76
         93 |        106        1.06       80.82
         95 |         76        0.76       81.58
         97 |        278        2.78       84.36
         99 |         60        0.60       84.96
        100 |          5        0.05       85.01
        101 |        150        1.50       86.51
        103 |         80        0.80       87.31
        105 |         15        0.15       87.46
        107 |        103        1.03       88.49
        109 |         26        0.26       88.75
        110 |          7        0.07       88.82
        111 |         95        0.95       89.77
        113 |         49        0.49       90.26
        115 |         71        0.71       90.97
        117 |         51        0.51       91.48
        119 |        138        1.38       92.86
        121 |         65        0.65       93.51
        122 |         39        0.39       93.90
        123 |         65        0.65       94.55
        125 |        121        1.21       95.76
        127 |         54        0.54       96.30
        129 |         21        0.21       96.51
        131 |         72        0.72       97.23
        133 |         62        0.62       97.85
        135 |         10        0.10       97.95
        139 |         15        0.15       98.10
        141 |          3        0.03       98.13
        143 |         37        0.37       98.50
        145 |         12        0.12       98.62
        147 |         11        0.11       98.73
        149 |         24        0.24       98.97
        150 |          2        0.02       98.99
        170 |         50        0.50       99.49
        199 |          1        0.01       99.50
        220 |         11        0.11       99.61
        231 |          5        0.05       99.66
        240 |          3        0.03       99.69
        261 |         15        0.15       99.84
        280 |          7        0.07       99.91
        941 |          3        0.03       99.94
        981 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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