Which of the following shows the smallest percentage increase in use in the U. S. from 1950 to 2015?

The diagram shows contribution of different energy sources used in the United States for the 2015 year. All energy sources are comprised by 35.4 percent of oil, 27.9 percent of natural gas, 18.3 percent of coal, 8.5 percent of nuclear energy, 4.9 percent of bioenergy, 2.5 percent of hydropower, and 2.4 percent of new renewables.

The plot shows fluctuation in energy consumption of six sources from 1950 to 2015 years. Oil energy consumption increases from 14 quads in 1950 to 37 quads in 1978, decreases to 30 quads in 1983, increases to 40 quads in 2005, decreases to 35 quads in 2008, and remains stable until 2015. Natural gas energy consumption increases from 7 quads in 1950 to 23 quads in 1972, decreases to 17 quads in 1986, increases to 23 quads in 1996, remains stable until 2007, and increases to 28 quads in 2015. Coal energy consumption decreases from 12 quads in 1950 to 10 quads in 1960, increases to 23 quads in 2006, and decreases to 16 quads in 2015. Nuclear power increases from 0 quads in 1970 to 8 quads in 1999, and remains stable until 2015. Bioenergy consumption increases from 2 quads in 1950 to 3 quads in 1984, remains stable until 2002, and increases to 5 quads in 2015. Hydropower consumption increases from 2 quads in 1950 to 3 quads in 1975 and remains stable until 2015.

Use the accompanying figure to answer the following question.

Which of the following shows the smallest percentage increase in use in the U. S. from 1950 to 2015?

bioenergy

natural gas

oil

nuclear power

coal