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

     county |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        254        2.54        2.54
          3 |        142        1.42        3.96
          5 |        163        1.63        5.59
          7 |        141        1.41        7.00
          9 |         79        0.79        7.79
         10 |          2        0.02        7.81
         11 |         50        0.50        8.31
         12 |         44        0.44        8.75
         13 |      1,013       10.13       18.88
         15 |        163        1.63       20.51
         17 |        130        1.30       21.81
         19 |        557        5.57       27.38
         20 |         77        0.77       28.15
         21 |        192        1.92       30.07
         23 |         55        0.55       30.62
         25 |        160        1.60       32.22
         27 |        102        1.02       33.24
         29 |        156        1.56       34.80
         31 |         74        0.74       35.54
         33 |         65        0.65       36.19
         35 |         41        0.41       36.60
         37 |        899        8.99       45.59
         38 |          5        0.05       45.64
         39 |         40        0.40       46.04
         41 |         38        0.38       46.42
         43 |         63        0.63       47.05
         45 |         61        0.61       47.66
         47 |        107        1.07       48.73
         49 |         72        0.72       49.45
         50 |          2        0.02       49.47
         51 |         76        0.76       50.23
         53 |         87        0.87       51.10
         55 |         83        0.83       51.93
         57 |         54        0.54       52.47
         59 |        240        2.40       54.87
         61 |         70        0.70       55.57
         63 |         62        0.62       56.19
         65 |        256        2.56       58.75
         67 |        156        1.56       60.31
         69 |         70        0.70       61.01
         71 |        416        4.16       65.17
         73 |        555        5.55       70.72
         75 |         93        0.93       71.65
         77 |        143        1.43       73.08
         79 |         67        0.67       73.75
         81 |         93        0.93       74.68
         83 |         61        0.61       75.29
         85 |        131        1.31       76.60
         87 |         42        0.42       77.02
         89 |        143        1.43       78.45
         90 |         35        0.35       78.80
         91 |         40        0.40       79.20
         93 |         89        0.89       80.09
         95 |         98        0.98       81.07
         97 |        212        2.12       83.19
         99 |        105        1.05       84.24
        100 |          2        0.02       84.26
        101 |         83        0.83       85.09
        103 |        111        1.11       86.20
        105 |         30        0.30       86.50
        107 |         94        0.94       87.44
        109 |         39        0.39       87.83
        110 |         12        0.12       87.95
        111 |         79        0.79       88.74
        113 |         70        0.70       89.44
        115 |         73        0.73       90.17
        117 |         95        0.95       91.12
        119 |        117        1.17       92.29
        121 |         65        0.65       92.94
        122 |         16        0.16       93.10
        123 |         52        0.52       93.62
        125 |         65        0.65       94.27
        127 |         92        0.92       95.19
        129 |         18        0.18       95.37
        130 |          3        0.03       95.40
        131 |         53        0.53       95.93
        133 |         58        0.58       96.51
        135 |         10        0.10       96.61
        137 |         10        0.10       96.71
        139 |         41        0.41       97.12
        141 |         38        0.38       97.50
        143 |         68        0.68       98.18
        145 |         47        0.47       98.65
        147 |          6        0.06       98.71
        149 |          3        0.03       98.74
        150 |         10        0.10       98.84
        170 |         58        0.58       99.42
        185 |          3        0.03       99.45
        240 |         11        0.11       99.56
        261 |         16        0.16       99.72
        290 |         20        0.20       99.92
        997 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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