Cite chart
IEA, Total public energy RD&D budgets per thousand units of GDP by country for 2021, IEA, Paris https://www.iea.org/data-and-statistics/charts/total-public-energy-rd-and-d-budgets-per-thousand-units-of-gdp-by-country-for-2021, IEA. Licence: CC BY 4.0