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

Metropolita |
        n - |
Nonmetropol |
itan County |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,326       83.26       83.26
          2 |      1,654       16.54       99.80
          9 |          9        0.09       99.89
          Z |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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