I think the data's being presented in a strange way. Since it's "people who make over $100k at least one year of their life", it makes sense that older people

I think the data's being presented in a strange way. Since it's "people who make over $100k at least one year of their life", it makes sense that older people would have higher numbers. They've been working more years, and because of that they usually have higher paying jobs due to having more experience or moving up to management positions.