These two pie charts depict how much 
energy
 was produced from distinctive Use synonyms
sources
 in a nation between 1985 and 2003.
Use synonyms
Overall
, Linking Words
it is clear that
 the use of hydrogen as a source has stayed the same in the two periods given. Other Linking Words
sources
 were used more in 2003, Use synonyms
while
 the use of Linking Words
oil
 to create Use synonyms
energy
 decreased dramatically in 2003.
Use synonyms
First, 
the Linking Words
energy
 which was created from Use synonyms
oil
 in 1985 was 52%; it was Use synonyms
also
 the most popular source of Linking Words
energy
 in that year. In 2003, the usage of Use synonyms
oil
 plummeted substantially, and the proportion was 39%. It needs to be said that, after decreasing, Use synonyms
oil
 was still the most usable source of Use synonyms
energy
 in 2003. Use synonyms
Second, 
other Linking Words
sources
 like natural gas, coal, nuclear, and other renewable Use synonyms
sources
 rocketed considerably in 2003, and their percentages are 23, 13, 17, and 4, respectively.
Use synonyms
Finally
, in 1985, the proportion of Linking Words
energy
 produced from hydrogen was 4% and stayed unchanged in 2003.Use synonyms