Frequencies for first 10,000 rows of urf_phyper variable in natl2016 dataset :

  Pregnancy |
 Associated |
Hypertensio |
    n 1 Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017