Frequencies for first 10,000 rows of cntyrfip variable in natl2002 dataset :

  County of |
  Residence |
     (FIPS) |      Freq.     Percent        Cum.
------------+-----------------------------------
      01073 |         49        0.49        0.49
      01089 |          8        0.08        0.57
      01097 |          3        0.03        0.60
      01101 |          9        0.09        0.69
      01103 |          1        0.01        0.70
      01125 |          6        0.06        0.76
      01999 |         79        0.79        1.55
      02020 |      4,130       41.30       42.85
      02999 |      5,701       57.01       99.86
      08013 |          1        0.01       99.87
      09013 |          1        0.01       99.88
      20999 |          1        0.01       99.89
      22999 |          1        0.01       99.90
      23011 |          1        0.01       99.91
      36001 |          1        0.01       99.92
      41999 |          1        0.01       99.93
      42013 |          1        0.01       99.94
      48441 |          1        0.01       99.95
      48999 |          1        0.01       99.96
      49999 |          1        0.01       99.97
      53999 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015