Frequencies for first 10,000 rows of metrores variable in natl2001 dataset :

Metropolita |
        n - |
Nonmetropol |
itan County |
         of |
  Residence |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,910       69.10       69.10
          2 |      3,089       30.89       99.99
          Z |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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