Original: While the proportion of wives working year-round in married couple households with children has increased from 17% in 1967 to 39% in 1996, the proportion of such households among the general population has decreased.
Simplified: For example, while the proportion of wives working year-round in married couple households with children has increased from 17% in 1967 to 39% in 1996, the proportion of such households among the general population has decreased.