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There is a proven positive relationship between the level of GDP per inhabitant and the percentage of GDP allocated to R&D. The wealthiest countries were those that made the greatest investment in R&D, which is to say more than 2.5% of their GDP: Sweden, Finland, Japan, Iceland, Switzerland, the USA and Germany. Among those who made an intermediate investment, from 1.5% to 2.5% of their GDP, were Denmark, Austria, France, Belgium, the United Kingdom, Holland, Luxembourg and Norway. The smallest investment in R&D was in Ireland (1.20%), Italy (1.11%), Spain (1.12%), Hungary (0.89%), Portugal (0.74%) and Poland (0.56%).
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