By Wilder Perkins
U.S. News & World Report has published a ranking of the "Best Colleges" since 1983, and during that time, they've made many changes to how they calculate their rankings.
This interactive website visualizes those formula changes, and provides a few insights into the reasons behind some of the changes.
On the next page, you can explore the graph by moving your mouse, and read more details in the text above the graph.
Sources: See US News ranking changes by year