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

 Met/Nonmet |
  county of |
  residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,315       83.15       83.15
          2 |      1,674       16.74       99.89
          9 |          8        0.08       99.97
          Z |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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