Frequencies for first 10,000 rows of urban variable in namcs1999 dataset :

 metro/non-metro status of location |
                          of office |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
MSA (Metropolitan Statistical Area) |      8,707       87.07       87.07
                            Non-MSA |      1,293       12.93      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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