natural resources on the island, Taiwan is forced to import many of its energy needs (currently at 98%). Imported energy totaled US$11.52 billion in 2002, accounting for 4.1% of its GDP. Although the industrial sector has traditionally been Taiwan's largest energy consumer, its share has dropped in recent years from 62% in 1986 to 58% in 2002. Taiwan's energy consumption is dominated by crude oil & petroleum products (48.52%), followed by coal (29.2%), natural gas (12.23%), nuclear power (8.33%), and hydroelectric power (0.28%). The island is also heavily dependent on imported oil, with 72% of its crude oil coming from the Middle East in 2002. Although the Taiwan Power Company (Taipower), state-owned enterprise, is in charge of providing electricity for the Taiwan area, a 1994 measure has allowed independent power producers (IPPs) to provide up to 20% of the island's energy needs. Indonesia and Malaysia supply most of Taiwan's natural gas needs. It currently has three operational nuclear power plants. A fourth plant under construction was mothballed in 2014. Although Taiwan's per capita energy use is on par with neighboring Asian countries, in July 2005 the Ministry of Economic Affairs announced plans to cut 170 million-tons of carbon dioxide emissions by 2025. In 2010, carbon dioxide emissions have been reduced by 5.14 million metric tons. In order to further reduce emissions, the government also plans to increase energy efficiency by 2% each year through 2020. In addition, by 2015 emissions are planned to be reduced by 7% compared to 2005 levels. Taiwan is the world's 4th largest producer of solar-powered batteries and largest LED manufacturer by volume. In 2010, Taiwan had over 1.66 million square meters of solar heat collectors installed, with an installation density that ranks it as third in the world. The government has already built 155 sets of wind turbines capable of producing 281.6 MW of electricity, and additional projects are planned or under construction. Renewable energy accounts for 6.8% of Taiwan's energy usage as of 2010. In 2010, the green energy sector generated US$10.97 billion in production value. The government also announced plans to invest US$838 million for renewable energy promotion and an additional US$635 million for research and development. Steel and heavy manufacturing Taiwan, as of 2017, is the world's thirteenth-largest steel exporter. In 2018, Taiwan exported 12.2 million metric tons of steel, a one percent increase from 12.0 million metric tons in 2017. Taiwan's