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

Eclampsia R |
(f_rf_eclam |
p rep flag) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,422       34.22       34.22
          N |      6,567       65.67       99.89
          U |          1        0.01       99.90
          Y |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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