Frequencies for first 10,000 rows of cntynat variable in natlterr1999 dataset :

NCHS County |
         of |
  Occurence |      Freq.     Percent        Cum.
------------+-----------------------------------
      52011 |      1,339       13.39       13.39
      52013 |        799        7.99       21.38
      52016 |        334        3.34       24.72
      52050 |        751        7.51       32.23
      52058 |      1,260       12.60       44.83
      52065 |      2,328       23.28       68.11
      52999 |      3,189       31.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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