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) conversion of her ballistic missile system to support Trident C-4 ballistic missiles. Upon completion of overhaul she returned to her home port of Charleston in January 1981. "Simon Bolivar" continued to make deterrent patrols, undergoing occasional refits at Naval Submarine Base Kings Bay Georgia, and was awarded her 4th and 5th Battle "E"'s in 1982 and 1990. She successfully launched a Trident test missile in the summer of 1983. In 1994 "Simon Bolivar" returned from its 73rd and final strategic nuclear deterrent patrol, 28 years after it departed port for its 1st patrol. Master Chief Hospital Corpsman (HMCM (SS)) William