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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        257        2.57        2.57
          3 |        121        1.21        3.78
          5 |        112        1.12        4.90
          7 |        129        1.29        6.19
          9 |         49        0.49        6.68
         11 |         14        0.14        6.82
         13 |        950        9.50       16.32
         15 |        153        1.53       17.85
         17 |        119        1.19       19.04
         19 |        465        4.65       23.69
         20 |         77        0.77       24.46
         21 |        141        1.41       25.87
         23 |         45        0.45       26.32
         25 |        188        1.88       28.20
         27 |        153        1.53       29.73
         29 |        223        2.23       31.96
         31 |        117        1.17       33.13
         33 |         64        0.64       33.77
         35 |         61        0.61       34.38
         37 |      1,191       11.91       46.29
         39 |         42        0.42       46.71
         40 |          4        0.04       46.75
         41 |         51        0.51       47.26
         43 |         58        0.58       47.84
         45 |         75        0.75       48.59
         47 |         91        0.91       49.50
         49 |         28        0.28       49.78
         51 |         77        0.77       50.55
         53 |        117        1.17       51.72
         55 |        117        1.17       52.89
         57 |         40        0.40       53.29
         59 |        282        2.82       56.11
         60 |          4        0.04       56.15
         61 |         69        0.69       56.84
         63 |         33        0.33       57.17
         65 |        287        2.87       60.04
         67 |        150        1.50       61.54
         69 |         80        0.80       62.34
         71 |        382        3.82       66.16
         73 |        485        4.85       71.01
         75 |        104        1.04       72.05
         77 |        122        1.22       73.27
         79 |        107        1.07       74.34
         81 |        141        1.41       75.75
         83 |        106        1.06       76.81
         85 |        178        1.78       78.59
         87 |         74        0.74       79.33
         89 |        104        1.04       80.37
         90 |         37        0.37       80.74
         91 |         23        0.23       80.97
         93 |        109        1.09       82.06
         95 |         76        0.76       82.82
         97 |        213        2.13       84.95
         99 |        122        1.22       86.17
        101 |         77        0.77       86.94
        103 |        122        1.22       88.16
        105 |         22        0.22       88.38
        107 |        138        1.38       89.76
        109 |         37        0.37       90.13
        110 |         14        0.14       90.27
        111 |         98        0.98       91.25
        113 |         64        0.64       91.89
        115 |         38        0.38       92.27
        117 |         47        0.47       92.74
        119 |         95        0.95       93.69
        120 |         19        0.19       93.88
        121 |         36        0.36       94.24
        123 |         52        0.52       94.76
        125 |         66        0.66       95.42
        127 |         62        0.62       96.04
        129 |         20        0.20       96.24
        130 |          6        0.06       96.30
        131 |         39        0.39       96.69
        133 |         39        0.39       97.08
        135 |         27        0.27       97.35
        137 |          2        0.02       97.37
        139 |         28        0.28       97.65
        141 |          4        0.04       97.69
        143 |         64        0.64       98.33
        145 |         36        0.36       98.69
        147 |          4        0.04       98.73
        149 |          5        0.05       98.78
        150 |          6        0.06       98.84
        170 |         35        0.35       99.19
        180 |          8        0.08       99.27
        190 |          3        0.03       99.30
        210 |         13        0.13       99.43
        230 |          6        0.06       99.49
        240 |          9        0.09       99.58
        250 |          8        0.08       99.66
        260 |          9        0.09       99.75
        270 |          1        0.01       99.76
        290 |         23        0.23       99.99
        997 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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