The provided line graph illustrates the expenditure of U.S. government on five major science-researching activities including Health, Space, Energy, General Science and Other over a period of 30 years, from 1980 to 2008. Overall, the most highlighted growth belonged to Health and the lowest contribution was the sector of General Science, whose position remained unchanged throughout the given timeframe.
To begin with, in 1980, Health and Other were invested most significantly, being nearly at the same start point approximately 8 billion and 7 billion dollars. However, the data on Health still led the statistical results to be the most prominent factor which reached to peak in 2004 of about 22 billion dollars although it once fluctuated wildly in 1984 and there was a declining tendency after the year 2004. Noticeably, despite of the significant difference at the beginning of Other sector and Energy whose ranks were second and fourth respectively, Government paid more attention to Space research leading to remarkable changes of them, which shown up the expenditure on Other fields plummeted to the least vitality with 5 billion dollars only in 2008, while the figure of Space was close to 10 billion dollars, being the second position at the end of period.
Furthermore, beginning at 5 billion dollars of expenditure from U.S Government in 1980, Energy was received a considerable investment in 1996, making a rocket change of data to 8 billion dollars in 1996. However, that figure dropped quickly after that then slightly increased in 2008, which could be predicted to keep rising in next years. Finally, General Science was the smallest contribution one although there was an insignificant incline during 30 years, remaining 5 billion dollars from 2000 to 2008, which was the end of the timeframe.