It's especially relevant that the 70% and 86% here are percentages of different totals. A "22% increase" sounds like the underlying number of positive results

It's especially relevant that the 70% and 86% here are percentages of different totals. A "22% increase" sounds like the underlying number of positive results increased by 22%, which it didn't. It increased by more than 22% because the total number of publications is increasing too. An "increase of 16 percentage points" would have been much more standard.