Frequencies for first 10,000 rows of urf_renal variable in natl2006 dataset :

      Renal |
disease RFP |
694=f_urf_r |
     enal U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         19        0.19        0.19
          2 |      9,837       98.37       98.56
          9 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015