Frequencies for first 10,000 rows of rf_diab variable in linkpe2009psden dataset :

 Diabetes R |
(f_rf_pdiab |
  rep flag) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,422       34.22       34.22
          N |      6,529       65.29       99.51
          U |          1        0.01       99.52
          Y |         48        0.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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