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

  County of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
      01037 |         49        0.49        0.49
      01045 |          8        0.08        0.57
      01049 |          3        0.03        0.60
      01051 |          9        0.09        0.69
      01052 |          1        0.01        0.70
      01063 |          6        0.06        0.76
      01999 |         79        0.79        1.55
      02003 |      4,130       41.30       42.85
      02999 |      5,701       57.01       99.86
      06007 |          1        0.01       99.87
      07007 |          1        0.01       99.88
      17999 |          1        0.01       99.89
      19999 |          1        0.01       99.90
      20006 |          1        0.01       99.91
      33001 |          1        0.01       99.92
      38999 |          1        0.01       99.93
      39007 |          1        0.01       99.94
      44221 |          1        0.01       99.95
      44999 |          1        0.01       99.96
      45999 |          1        0.01       99.97
      48999 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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