invited sides including teams from North America, currently played annually but until 2013 was usually played every two seasons. Infrastructure Energy Due to the diversity of topography and pluviometric precipitation conditions, the region's water resources vary enormously in different areas. In the Andes, navigation possibilities are limited, except for the Magdalena River, Lake Titicaca and the lakes of the southern regions of Chile and Argentina. Irrigation is an important factor for agriculture from northwestern Peru to Patagonia. Less than 10% of the known electrical potential of the Andes had been used until the mid-1960s. The Brazilian Highlands have a much higher hydroelectric potential than the Andean region and its possibilities of exploitation are greater due to the existence of several large rivers with high margins and the occurrence of great differences forming huge cataracts, such as those of Paulo Afonso, Iguaçu and others. The Amazon River system has about 13,000 km of waterways, but its possibilities for hydroelectric use are still unknown. Most of the continent's energy is generated through hydroelectric power plants, but there is also an important share of thermoelectric and wind energy. Brazil and Argentina are the only South American countries that generate nuclear power, each with two nuclear power plants. In 1991 these countries signed a peaceful nuclear cooperation agreement. The Brazilian government has undertaken an ambitious program to reduce dependence on imported petroleum. Imports previously accounted for more than 70% of the country's oil needs but Brazil became self-sufficient in oil in 2006–2007. Brazil was the 10th largest oil producer in the world in 2019, with 2.8 million barrels / day. Production manages to supply the country's demand. In the beginning of 2020, in the production of oil and natural gas, the country exceeded 4 million barrels of oil equivalent per day, for the first time. In January this year, 3.168 million barrels of oil per day and 138.753 million cubic meters of natural gas were extracted. Brazil is one of the main world producers of hydroelectric power. In 2019, Brazil had 217 hydroelectric plants in operation, with an installed capacity of 98,581 MW, 60.16% of the country's energy generation. In the total generation of electricity, in 2019 Brazil reached 170,000 megawatts of installed capacity, more than 75% from renewable sources (the majority, hydroelectric). In 2013, the Southeast Region used about 50% of the load of the National Integrated System (SIN), being the main energy