In 2013, the Southeast Region used about 50% of the load of the National Integrated System (SIN), being the main energy consuming region in the country. The region's installed electricity generation capacity totaled almost 42,500 MW, which represented about a third of Brazil's generation capacity. The hydroelectric generation represented 58% of the region's installed capacity, with the remaining 42% corresponding basically to the thermoelectric generation. São Paulo accounted for 40% of this capacity; Minas Gerais by about 25%; Rio de Janeiro by 13.3%; and Espírito Santo accounted for the rest. The South Region owns the Itaipu Dam, which was the largest hydroelectric plant in the world for several years, until the inauguration of Three Gorges Dam in China. It remains the second largest operating hydroelectric in the world. Brazil is the co-owner of the Itaipu Plant with Paraguay: the dam is located on the Paraná River, located on the border between countries. It has an installed generation capacity of 14 GW for 20 generating units of 700 MW each. North Region has large hydroelectric plants, such as Belo Monte Dam and Tucuruí Dam, which produce much of the national energy. Brazil's hydroelectric potential has not yet been fully exploited, so the country still has the capacity to build several renewable energy plants in its territory.