@Coyote from what I can tell that's just people staying together for longer. Which is great, but I don't know anyone that's been divorced within a year of them getting married.
It would be better to get divorced sooner, all things considered.
Here are some other stats on divorce, the number is nearly 50% (don't wanna do math right now): https://www.survivedivorce.com/how-many-marriages-end-in-divorce