Economy of South America centuries. This can be explained by South America´s high concentration on primary commodities as well as the state of the educational system and institutional structure, some of which are still related to its colonial past, others to recent political developments. It was only from the 1990s when countries in South America switched over to the system of Free-Market economy. This eventually pulled countries in South America out of the debt crisis. Now, major economic activities include agriculture, industry, forestry, and mining. In 2016, four countries, which include Brazil, Ecuador, Argentina and República Bolivariana de Venezuela experienced decline in output. Other
USS Simon Bolivar (SSBN-641) Bolivar". As part of a "warm – cold water" refit exchange program, in 1977 the ship conducted one "cold water" refit from the Holy Loch SSBN site in Scotland with maintenance and supply services provided by submarine tender . Departing Holy Loch for her assigned operating areas the ship then completed its 34th deterrent patrol. Following a trans-Atlantic transit, "Simon Bolivar" returned to the "warm water" Charleston SSBN site to continue its normal refit-patrol operating cycle from the continental US. In February 1979, following her 40th deterrent patrol, "Simon Bolivar" entered Portsmouth Naval Shipyard at Kittery, Maine, for overhaul and