<p>Sorry. I was typing on a phone and couldn’t be quite accurate there. If you download the raw data behind the site, you’ll notice that every group but white men has data in the most recent year, who show 0 4-year graduates. Given the large number of them, it pulls down the entire rate . No other group shows a drop-off. In fact, if you look at various demographic groups over time, the trends in 4-year and 6-year graduation rates appear to be upward in the last decade, sometimes very strongly so.</p>