Frequencies for first 10,000 rows of urbanrur variable in nhamcsed2008 dataset :

            urban-rural |
      classification of |
     patient's zip code |      Freq.     Percent        Cum.
------------------------+-----------------------------------
           missing data |        303        3.03        3.03
    large central metro |      2,594       25.94       28.97
     large fringe metro |      1,821       18.21       47.18
           medium metro |      3,066       30.66       77.84
            small metro |        528        5.28       83.12
micropolitan (nonmetro) |      1,688       16.88      100.00
------------------------+-----------------------------------
                  Total |     10,000      100.00

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