[Bennett548]

I understand the reasoning behind the diminishing effect, I was just curious about the value chosen. With the current number ~80% of a team's ranking comes from the most recent 4 years.

I don't think there is a number everyone can agree upon. I would use a bigger weight that 66%, so that older years have more weight. It seems to me that mentors and sponsors are a big part of a teams success, and that they have a slower turnover rate.