OMAHA, Neb. (AP) — Nebraska’s marriage rate has dropped to its lowest point since 1925.

In 2013, the state’s marriage rate was 6.3 marriages per 1,000 residents, according to a study by the Nebraska Department of Health and Human Services. The rate was 6 in 1,000 in 1925.

The national marriage rate was 6.8 marriages per 1,000 residents in 2012.

The report says over half of all marriages in Nebraska in 2013 included either a bride or a groom who were over 30 years of age, which is up 40 percent from 1988.

A sociology professor says that people have shifted from looking for a “yoke mate” who can help them survive financially to a “soul mate.” Sociologists also cite women delaying marriage to pursue education and a career, and more couples choosing to live together without getting married.