Frequencies for first 10,000 rows of urf_eclam variable in natl2014 dataset :

Eclampsia 1 |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        145        1.45        1.45
          2 |      9,727       97.27       98.72
          9 |        128        1.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016