Frequencies for first 10,000 rows of metrores variable in natlterr2002 dataset :

Metropolita |
        n - |
Nonmetropol |
itan County |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,409       84.09       84.09
          2 |      1,577       15.77       99.86
          9 |          4        0.04       99.90
          Z |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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