Frequencies for first 10,000 rows of f_urf_eclamp variable in natl2008 dataset :

  Eclampsia |
(urf_eclam) |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         39        0.39        0.39
          1 |      9,961       99.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016