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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        196        1.96        1.96
          3 |        233        2.33        4.29
          5 |        154        1.54        5.83
          7 |        144        1.44        7.27
          9 |         66        0.66        7.93
         11 |         26        0.26        8.19
         12 |         67        0.67        8.86
         13 |      1,455       14.55       23.41
         15 |        199        1.99       25.40
         17 |        181        1.81       27.21
         19 |        656        6.56       33.77
         20 |         89        0.89       34.66
         21 |        226        2.26       36.92
         23 |         47        0.47       37.39
         25 |        212        2.12       39.51
         27 |        142        1.42       40.93
         29 |        189        1.89       42.82
         31 |         82        0.82       43.64
         33 |         64        0.64       44.28
         35 |         71        0.71       44.99
         37 |        533        5.33       50.32
         39 |         41        0.41       50.73
         41 |         30        0.30       51.03
         43 |         96        0.96       51.99
         45 |         64        0.64       52.63
         47 |         94        0.94       53.57
         49 |         57        0.57       54.14
         50 |          1        0.01       54.15
         51 |         60        0.60       54.75
         53 |        113        1.13       55.88
         55 |         85        0.85       56.73
         57 |         53        0.53       57.26
         59 |        166        1.66       58.92
         61 |         51        0.51       59.43
         63 |         45        0.45       59.88
         65 |        257        2.57       62.45
         67 |        144        1.44       63.89
         69 |         58        0.58       64.47
         71 |        302        3.02       67.49
         73 |        450        4.50       71.99
         75 |         56        0.56       72.55
         77 |        211        2.11       74.66
         79 |         53        0.53       75.19
         81 |         82        0.82       76.01
         83 |         84        0.84       76.85
         85 |        137        1.37       78.22
         87 |         36        0.36       78.58
         89 |        149        1.49       80.07
         90 |          8        0.08       80.15
         91 |         24        0.24       80.39
         93 |         35        0.35       80.74
         95 |        107        1.07       81.81
         97 |        226        2.26       84.07
         99 |         72        0.72       84.79
        101 |        112        1.12       85.91
        103 |         76        0.76       86.67
        105 |         18        0.18       86.85
        107 |         94        0.94       87.79
        109 |         40        0.40       88.19
        110 |          6        0.06       88.25
        111 |         71        0.71       88.96
        113 |         77        0.77       89.73
        115 |        108        1.08       90.81
        117 |         72        0.72       91.53
        119 |        122        1.22       92.75
        121 |         62        0.62       93.37
        122 |         39        0.39       93.76
        123 |         59        0.59       94.35
        125 |        115        1.15       95.50
        127 |         74        0.74       96.24
        129 |         20        0.20       96.44
        130 |          7        0.07       96.51
        131 |         40        0.40       96.91
        133 |         10        0.10       97.01
        135 |          3        0.03       97.04
        137 |         16        0.16       97.20
        139 |         26        0.26       97.46
        141 |         18        0.18       97.64
        143 |         93        0.93       98.57
        145 |         34        0.34       98.91
        147 |         18        0.18       99.09
        149 |         19        0.19       99.28
        150 |          2        0.02       99.30
        164 |          1        0.01       99.31
        170 |         31        0.31       99.62
        180 |          4        0.04       99.66
        188 |          4        0.04       99.70
        220 |          3        0.03       99.73
        232 |          3        0.03       99.76
        240 |          8        0.08       99.84
        261 |          1        0.01       99.85
        290 |         11        0.11       99.96
        999 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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