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

     County |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        250        2.50        2.50
          3 |        132        1.32        3.82
          5 |        221        2.21        6.03
          7 |        156        1.56        7.59
          9 |         78        0.78        8.37
         11 |         13        0.13        8.50
         12 |         43        0.43        8.93
         13 |      1,110       11.10       20.03
         15 |        215        2.15       22.18
         17 |        147        1.47       23.65
         19 |        448        4.48       28.13
         20 |        136        1.36       29.49
         21 |        214        2.14       31.63
         23 |         72        0.72       32.35
         25 |        193        1.93       34.28
         27 |        120        1.20       35.48
         29 |        150        1.50       36.98
         31 |         92        0.92       37.90
         33 |         74        0.74       38.64
         35 |         70        0.70       39.34
         37 |        952        9.52       48.86
         39 |         37        0.37       49.23
         40 |          4        0.04       49.27
         41 |         41        0.41       49.68
         43 |         87        0.87       50.55
         45 |         85        0.85       51.40
         47 |         51        0.51       51.91
         49 |         38        0.38       52.29
         50 |          1        0.01       52.30
         51 |         58        0.58       52.88
         53 |         97        0.97       53.85
         55 |         75        0.75       54.60
         57 |         39        0.39       54.99
         59 |        261        2.61       57.60
         61 |         47        0.47       58.07
         63 |         30        0.30       58.37
         65 |        278        2.78       61.15
         67 |        143        1.43       62.58
         69 |         90        0.90       63.48
         70 |         11        0.11       63.59
         71 |        395        3.95       67.54
         73 |        516        5.16       72.70
         75 |         66        0.66       73.36
         77 |        114        1.14       74.50
         79 |         87        0.87       75.37
         81 |         94        0.94       76.31
         83 |         93        0.93       77.24
         85 |        199        1.99       79.23
         87 |         52        0.52       79.75
         89 |        104        1.04       80.79
         90 |         41        0.41       81.20
         91 |         38        0.38       81.58
         93 |         67        0.67       82.25
         95 |         63        0.63       82.88
         97 |        248        2.48       85.36
         99 |         66        0.66       86.02
        100 |          4        0.04       86.06
        101 |         95        0.95       87.01
        103 |         68        0.68       87.69
        105 |         14        0.14       87.83
        107 |        116        1.16       88.99
        109 |         25        0.25       89.24
        110 |          9        0.09       89.33
        111 |        145        1.45       90.78
        113 |         87        0.87       91.65
        115 |         75        0.75       92.40
        117 |         53        0.53       92.93
        119 |         98        0.98       93.91
        120 |         47        0.47       94.38
        121 |         40        0.40       94.78
        123 |         56        0.56       95.34
        125 |         86        0.86       96.20
        127 |         47        0.47       96.67
        129 |         20        0.20       96.87
        131 |         65        0.65       97.52
        133 |          9        0.09       97.61
        135 |         11        0.11       97.72
        137 |          7        0.07       97.79
        139 |         26        0.26       98.05
        141 |         10        0.10       98.15
        143 |         56        0.56       98.71
        145 |         25        0.25       98.96
        147 |          5        0.05       99.01
        149 |          5        0.05       99.06
        150 |          1        0.01       99.07
        170 |         42        0.42       99.49
        180 |          4        0.04       99.53
        210 |         12        0.12       99.65
        230 |          5        0.05       99.70
        240 |          2        0.02       99.72
        260 |          5        0.05       99.77
        270 |          6        0.06       99.83
        280 |          2        0.02       99.85
        290 |         12        0.12       99.97
        997 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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