Frequencies for first 10,000 rows of cntynat variable in natlterr2001 dataset :

  County of |
 Occurrence |      Freq.     Percent        Cum.
------------+-----------------------------------
      52011 |      1,298       12.98       12.98
      52013 |        706        7.06       20.04
      52016 |        255        2.55       22.59
      52050 |        680        6.80       29.39
      52058 |      1,215       12.15       41.54
      52065 |      2,435       24.35       65.89
      52999 |      3,411       34.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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