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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        260        2.60        2.60
          3 |        207        2.07        4.67
          5 |        165        1.65        6.32
          7 |        174        1.74        8.06
          9 |         65        0.65        8.71
         10 |          3        0.03        8.74
         11 |         19        0.19        8.93
         13 |      1,088       10.88       19.81
         15 |        134        1.34       21.15
         17 |        186        1.86       23.01
         19 |        617        6.17       29.18
         20 |         80        0.80       29.98
         21 |        152        1.52       31.50
         23 |         85        0.85       32.35
         25 |        163        1.63       33.98
         27 |        138        1.38       35.36
         29 |        188        1.88       37.24
         31 |         63        0.63       37.87
         33 |         70        0.70       38.57
         35 |         71        0.71       39.28
         37 |      1,058       10.58       49.86
         39 |         37        0.37       50.23
         40 |          2        0.02       50.25
         41 |         62        0.62       50.87
         43 |         43        0.43       51.30
         45 |         66        0.66       51.96
         47 |         70        0.70       52.66
         49 |         34        0.34       53.00
         51 |         71        0.71       53.71
         53 |         64        0.64       54.35
         55 |         94        0.94       55.29
         57 |         41        0.41       55.70
         59 |        297        2.97       58.67
         60 |          3        0.03       58.70
         61 |         65        0.65       59.35
         63 |         50        0.50       59.85
         65 |        249        2.49       62.34
         67 |        179        1.79       64.13
         69 |         71        0.71       64.84
         70 |          2        0.02       64.86
         71 |        336        3.36       68.22
         73 |        530        5.30       73.52
         75 |        102        1.02       74.54
         77 |        123        1.23       75.77
         79 |         56        0.56       76.33
         81 |         88        0.88       77.21
         83 |        102        1.02       78.23
         85 |        211        2.11       80.34
         87 |         42        0.42       80.76
         89 |        125        1.25       82.01
         90 |         10        0.10       82.11
         91 |         35        0.35       82.46
         93 |         57        0.57       83.03
         95 |         65        0.65       83.68
         97 |        258        2.58       86.26
         99 |         92        0.92       87.18
        100 |          2        0.02       87.20
        101 |        112        1.12       88.32
        103 |         89        0.89       89.21
        105 |         16        0.16       89.37
        107 |         89        0.89       90.26
        109 |         20        0.20       90.46
        111 |        120        1.20       91.66
        113 |         52        0.52       92.18
        115 |         55        0.55       92.73
        117 |         52        0.52       93.25
        119 |        107        1.07       94.32
        120 |         14        0.14       94.46
        121 |         36        0.36       94.82
        123 |         51        0.51       95.33
        125 |         73        0.73       96.06
        127 |         49        0.49       96.55
        129 |         27        0.27       96.82
        130 |          6        0.06       96.88
        131 |         30        0.30       97.18
        133 |         36        0.36       97.54
        135 |         15        0.15       97.69
        137 |          5        0.05       97.74
        139 |         39        0.39       98.13
        140 |          3        0.03       98.16
        141 |          3        0.03       98.19
        143 |         43        0.43       98.62
        145 |         21        0.21       98.83
        147 |         20        0.20       99.03
        149 |          6        0.06       99.09
        150 |          5        0.05       99.14
        160 |          1        0.01       99.15
        170 |         23        0.23       99.38
        180 |          4        0.04       99.42
        190 |          4        0.04       99.46
        210 |         14        0.14       99.60
        220 |         10        0.10       99.70
        230 |          4        0.04       99.74
        240 |          6        0.06       99.80
        260 |          7        0.07       99.87
        290 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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