Williams-Institute-Logo copyA new study by the Williams Institute found that gay and lesbian couples who marry are half as likely to divorce as straight couples.

The study found that 1.1 percent of same-sex couples dissolve their relationships each year while 2 percent of opposite-sex couples divorce.

While same-sex marriage is new in most states, the statistics include 13 years of data from domestic partnerships in California and almost 10 years of data from civil unions in New Jersey.

The study also found female couples are more likely than male couples to formalize their relationships. Also, even in states that already had marriage equality, same-sex couples were more likely to marry after the Windsor decision that struck down part of the Defense of Marriage Act.