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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        293        2.93        2.93
          3 |        224        2.24        5.17
          5 |        207        2.07        7.24
          7 |        199        1.99        9.23
          9 |        114        1.14       10.37
         11 |         46        0.46       10.83
         13 |        997        9.97       20.80
         15 |        177        1.77       22.57
         17 |        150        1.50       24.07
         19 |        529        5.29       29.36
         20 |        120        1.20       30.56
         21 |        262        2.62       33.18
         23 |         70        0.70       33.88
         25 |        158        1.58       35.46
         27 |        187        1.87       37.33
         29 |        104        1.04       38.37
         31 |         80        0.80       39.17
         33 |         69        0.69       39.86
         35 |         88        0.88       40.74
         37 |        856        8.56       49.30
         39 |         36        0.36       49.66
         40 |          1        0.01       49.67
         41 |         48        0.48       50.15
         43 |         50        0.50       50.65
         45 |         48        0.48       51.13
         47 |         74        0.74       51.87
         49 |         63        0.63       52.50
         50 |          2        0.02       52.52
         51 |         58        0.58       53.10
         53 |         84        0.84       53.94
         55 |         83        0.83       54.77
         57 |         83        0.83       55.60
         59 |        280        2.80       58.40
         61 |         65        0.65       59.05
         63 |         53        0.53       59.58
         65 |        204        2.04       61.62
         67 |        117        1.17       62.79
         69 |         62        0.62       63.41
         70 |          1        0.01       63.42
         71 |        261        2.61       66.03
         73 |        497        4.97       71.00
         75 |         81        0.81       71.81
         77 |        108        1.08       72.89
         79 |         38        0.38       73.27
         80 |          2        0.02       73.29
         81 |         86        0.86       74.15
         83 |         88        0.88       75.03
         85 |        165        1.65       76.68
         87 |         77        0.77       77.45
         89 |        106        1.06       78.51
         90 |         45        0.45       78.96
         91 |         72        0.72       79.68
         93 |         92        0.92       80.60
         95 |         88        0.88       81.48
         97 |        225        2.25       83.73
         99 |         90        0.90       84.63
        101 |        103        1.03       85.66
        103 |         76        0.76       86.42
        105 |         32        0.32       86.74
        107 |         99        0.99       87.73
        109 |         57        0.57       88.30
        110 |          6        0.06       88.36
        111 |        107        1.07       89.43
        113 |         80        0.80       90.23
        115 |         86        0.86       91.09
        117 |         52        0.52       91.61
        119 |        154        1.54       93.15
        120 |         25        0.25       93.40
        121 |         73        0.73       94.13
        123 |         69        0.69       94.82
        125 |         73        0.73       95.55
        127 |         67        0.67       96.22
        129 |         25        0.25       96.47
        130 |          5        0.05       96.52
        131 |         41        0.41       96.93
        133 |         42        0.42       97.35
        135 |         10        0.10       97.45
        137 |          3        0.03       97.48
        139 |         46        0.46       97.94
        141 |         10        0.10       98.04
        143 |         44        0.44       98.48
        145 |         31        0.31       98.79
        147 |          2        0.02       98.81
        149 |          2        0.02       98.83
        150 |          7        0.07       98.90
        170 |         47        0.47       99.37
        180 |          6        0.06       99.43
        210 |          6        0.06       99.49
        220 |          5        0.05       99.54
        230 |          2        0.02       99.56
        240 |          1        0.01       99.57
        250 |          2        0.02       99.59
        260 |         30        0.30       99.89
        280 |          5        0.05       99.94
        290 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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