Frequencies for first 10,000 rows of urbanrur variable in nhamcsopd2010 dataset :

  urban-rural classification of |
                  patient's zip |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                   missing data |        212        2.12        2.12
            large central metro |      1,862       18.62       20.74
             large fringe metro |      2,070       20.70       41.44
                   medium metro |      3,623       36.23       77.67
                   small metro' |        510        5.10       82.77
micropolitan/noncore (nonmetro) |      1,723       17.23      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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