The graph below shows the spending on research into renewable sources of energy in four countries between 1975 and 2000. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The graph illustrates the amount of money spent on research into renewable energy sources in four countries (the UK, Spain, Denmark, and Germany) over a 25-year period from 1975 to 2000.

Overall

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, all four countries increased their spending on renewable energy research by the end of the duration. Spain experienced the most substantial growth,

while

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Denmark’s spending surged notably after a course of stability.

In contrast

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, the UK showed fluctuations followed by a steady decline in investment during the later years. In terms of trends, all countries

initially

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increased their spending between 1975 and 1980. Spain’s expenditure continued to rise sharply after 1980, peaking in 1995 before slightly declining. Denmark’s investment remained stable throughout the 1980s but rose dramatically after 1990, reaching its highest point by 2000. Meanwhile, the UK experienced fluctuations during the 1980s but saw its spending decrease steadily after 1990, ending at the lowest level among the four nations. Germany,

by comparison

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, demonstrated consistent growth in its spending, gradually increasing throughout the season.