Erg times for some of the more elite level rowers out there?

I'm just curious. I'm a rower in high school, going to a D1 school next year for rowing. I know what erg times I need to row there and progress through the ranks as I approach senior year. im just curious what kind of times you would need for teams such as the U23 national team, making the olympic squad, or rowing for oxford or cambridge in "the boat race". 2k erg scores would be best, but 6k times would be good too. I appreciate it. I've been wondering what kind of times these people are pulling for a while now