 
<prompt> Trends in polygyny | Percentage of married women age 15-49 in a polygynous union | (1990 NDHS, 41) (2003 NDHS, 36) (2008 NDHS, 33) (2013 NDHS, 33) (2018 NDHS, 31) <response> Thirty-one percent of currently married women are in a polygynous union, as compared with 41% in 1990 and 33% in 2013.  