Since no one has answered, I'll try to help. I'm not the authoritative person on this topic, however. My understanding is that there's no way to visualize data beyond a certain date range in the web UI. I think the answer is that we retain data for longer than what you stated. However, if you can't easily get access to that data, I'm not sure that it really helps you. The only question is how long data could be accessed via other methods, mainly the API. I don't know the answer to that. I'm also not sure what the maximum retention is (I've heard different values, but all much greater than 60 days).
Does that help answer your question? It depends on your goal, really.