It’s June, one of the most popular months of the year to marry. So perhaps it’s time we talked about divorce.

In 2017, around one million couples in the U.S. called it quits.

That may sound like a lot of busted unions, but the rate of divorce—just like the rate of marriage—is down.

Today, younger married couples are less likely to split up than they once were, driving the trend. But, at the same time, the rate of divorce for older generations has increased in a phenomenon known as “gray” divorce.

Divorces hit a historical high point in 1979, when 22.6 marriages out of every 1,000 broke up, according to researchers at the National Center for Family and Marriage Research at Bowling Green University.