Frequencies for first 10,000 rows of urbanrur variable in namcs2011 dataset :

            Recoded urban-rural |
classification of patient's ZIP |
                           code |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                   Missing data |        400        4.00        4.00
            Large central metro |      2,575       25.75       29.75
             Large fringe metro |      2,270       22.70       52.45
                   Medium metro |      2,352       23.52       75.97
                   Small metro' |        678        6.78       82.75
Micropolitan/noncore (nonmetro) |      1,725       17.25      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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