Frequencies for first 10,000 rows of cntynat variable in natlterr2000 dataset :

NCHS County |
         of |
  Occurence |      Freq.     Percent        Cum.
------------+-----------------------------------
      52011 |      1,358       13.58       13.58
      52013 |        756        7.56       21.14
      52016 |        291        2.91       24.05
      52050 |        749        7.49       31.54
      52058 |      1,144       11.44       42.98
      52065 |      2,405       24.05       67.03
      52999 |      3,297       32.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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