Frequencies for first 10,000 rows of urban variable in namcs1993 dataset :

  metro/non-metro status of location of |
                                 office |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
SMSA (Standard Metropolitan Statistical |      7,291       72.91       72.91
                                Non-MSA |      2,709       27.09      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016