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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        193        1.93        1.93
          3 |        146        1.46        3.39
          5 |        240        2.40        5.79
          7 |        133        1.33        7.12
          9 |         65        0.65        7.77
         11 |         16        0.16        7.93
         12 |         51        0.51        8.44
         13 |      1,155       11.55       19.99
         15 |        166        1.66       21.65
         17 |        159        1.59       23.24
         19 |        518        5.18       28.42
         20 |        142        1.42       29.84
         21 |        158        1.58       31.42
         23 |         32        0.32       31.74
         25 |        117        1.17       32.91
         27 |         77        0.77       33.68
         29 |        170        1.70       35.38
         31 |         79        0.79       36.17
         33 |         52        0.52       36.69
         35 |         55        0.55       37.24
         37 |      1,095       10.95       48.19
         39 |         44        0.44       48.63
         41 |         45        0.45       49.08
         43 |         96        0.96       50.04
         45 |         63        0.63       50.67
         47 |         75        0.75       51.42
         49 |         40        0.40       51.82
         50 |          3        0.03       51.85
         51 |         75        0.75       52.60
         53 |         87        0.87       53.47
         55 |         64        0.64       54.11
         57 |         39        0.39       54.50
         59 |        214        2.14       56.64
         60 |          2        0.02       56.66
         61 |         49        0.49       57.15
         63 |         39        0.39       57.54
         65 |        326        3.26       60.80
         67 |        144        1.44       62.24
         69 |         72        0.72       62.96
         70 |          2        0.02       62.98
         71 |        328        3.28       66.26
         73 |        416        4.16       70.42
         75 |         77        0.77       71.19
         77 |        156        1.56       72.75
         79 |         90        0.90       73.65
         81 |        160        1.60       75.25
         83 |        104        1.04       76.29
         85 |        161        1.61       77.90
         87 |         72        0.72       78.62
         89 |        135        1.35       79.97
         90 |         28        0.28       80.25
         91 |         51        0.51       80.76
         93 |         57        0.57       81.33
         95 |         97        0.97       82.30
         97 |        229        2.29       84.59
         99 |         73        0.73       85.32
        100 |          2        0.02       85.34
        101 |         90        0.90       86.24
        103 |         83        0.83       87.07
        105 |         21        0.21       87.28
        107 |         83        0.83       88.11
        109 |         28        0.28       88.39
        110 |         22        0.22       88.61
        111 |        104        1.04       89.65
        113 |        109        1.09       90.74
        115 |         24        0.24       90.98
        117 |         48        0.48       91.46
        119 |        108        1.08       92.54
        120 |         12        0.12       92.66
        121 |         46        0.46       93.12
        123 |         40        0.40       93.52
        125 |        167        1.67       95.19
        127 |         60        0.60       95.79
        129 |         30        0.30       96.09
        130 |         12        0.12       96.21
        131 |         48        0.48       96.69
        133 |         33        0.33       97.02
        135 |         10        0.10       97.12
        137 |          2        0.02       97.14
        139 |         37        0.37       97.51
        141 |         22        0.22       97.73
        143 |         86        0.86       98.59
        145 |         29        0.29       98.88
        147 |          2        0.02       98.90
        149 |          9        0.09       98.99
        150 |         12        0.12       99.11
        160 |          1        0.01       99.12
        170 |         51        0.51       99.63
        210 |          2        0.02       99.65
        230 |          4        0.04       99.69
        240 |          3        0.03       99.72
        250 |          2        0.02       99.74
        260 |          9        0.09       99.83
        290 |         13        0.13       99.96
        933 |          1        0.01       99.97
        997 |          2        0.02       99.99
        999 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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