Figure 5 shows the relative contributions to changes in deaths and DALYs of important drivers grouped into four mutually exclusive categories: population growth, population ageing, trends in exposure to all risk factors measured in GBD 2016, and all other factors combined. Globally, trends in exposure to all risk factors combined would have led to a decrease of deaths by 9·3% (6·9–11·6) and DALYs by 10·8% (8·3–13·1). Risk factors play a larger part in CMNN causes, where trends in exposure to risks would have resulted in a decrease of deaths by 14·9% (12·4–17·1) and DALYs by 15·0% (12·7–17·6). Overall, population ageing and population growth are both driving deaths and DALYs to increase significantly. At the global level, across all causes, population growth alone would have resulted in 12·4% (10·1–14·9) more deaths and 12·4% (10·1–14·9) more DALYs, while population ageing would have contributed 14·9% (12·7–17·5) more deaths and 12·4% (10·1–14·9) more DALYs. The contribution of population ageing in NCDs is noteworthy as it is the largest driver of trends in NCDs, and accounts for 19·5% (17·3–22·0) more deaths and 14·0% (11·6–16·3) more
