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

The line graph compares the

research

expenditures on renewable energy resources in the UK, Spain, Denmark, and Switzerland over a five-year period.

Overall

, the amount of money that was spent on

this

field of study in Switzerland was by far the highest.

In contrast

, fewer investments were in renewable power resources not only in Spain but

also

in England ,comparatively. The starting point of

research

on

this

clean form of energy in all four countries was in 1975. In the subsequent years, the figure for

research

expenses in Switzerland grew steadily to $5 per person.

Similarly

, the amount of money spent on renewable power increased dramatically in Denmark except in the years between 1980 and 1990, which levelled out at just over $1 per person. From 1980 to 2000, the figure for the UK dipped erratically to well over $0 and peaked at just over $1 in 1980.

However

, during the same period, these expenses fluctuated around $1 in Spain and

and

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the minimum amount was dedicated to environmentally friendly energy

research

in 1990.