Frequencies for first 10,000 rows of renal variable in linkco1991us_num dataset :

      Renal |
    disease |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         46        0.46        0.46
          2 |      9,674       96.74       97.20
          9 |        280        2.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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