Frequencies for first 10,000 rows of cntyres variable in natlterr2002 dataset :

  County of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
      10000 |          1        0.01        0.01
      20000 |          1        0.01        0.02
      33000 |          1        0.01        0.03
      39000 |          1        0.01        0.04
      52011 |        562        5.62        5.66
      52013 |        409        4.09        9.75
      52016 |        488        4.88       14.63
      52050 |        200        2.00       16.63
      52058 |        487        4.87       21.50
      52065 |        993        9.93       31.43
      52999 |      6,840       68.40       99.83
      53999 |          7        0.07       99.90
      59ZZZ |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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