system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does it seem like the older I get the faster time speeds up?

For example, middle and high school seemed like it lasted forever but college felt like it was over in a flash. Why?
gpt
As each year passes, it is a smaller.percentage of your total life than any of the years that came before it.  When you are five, a year is 20% of the time you have lived.  By the time you are fifty, it is only 2%.