Frequencies for first 10,000 rows of cntynat variable in natlterr1998 dataset :

NCHS County |
         of |
  Occurence |      Freq.     Percent        Cum.
------------+-----------------------------------
      52011 |      1,337       13.37       13.37
      52013 |        767        7.67       21.04
      52016 |        331        3.31       24.35
      52050 |        796        7.96       32.31
      52058 |      1,251       12.51       44.82
      52065 |      2,381       23.81       68.63
      52999 |      3,137       31.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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