With favourable trade from the Soviet bloc ended, Castro publicly declared that Cuba was entering a "Special Period in Time of Peace". Petrol rations were dramatically reduced, Chinese bicycles were imported to replace cars, and factories performing non-essential tasks were shut down. Oxen began to replace tractors, firewood began being used for cooking and electricity cuts were introduced that lasted 16 hours a day. Castro admitted that Cuba faced the worst situation short of open war, and that the country might have to resort to subsistence farming. By 1992, Cuba's economy had declined by over 40% in under two years, with major food shortages, widespread malnutrition and a lack of basic goods. Castro hoped for a restoration of Marxism–Leninism in the USSR, but refrained from backing the 1991 coup in that country. When Gorbachev regained control, Cuba-Soviet relations deteriorated further and Soviet troops were withdrawn in September 1991. In December, the Soviet Union was officially dissolved as Boris Yeltsin abolished the Communist Party of the Soviet Union and introducing a capitalist multiparty democracy. Yeltsin despised Castro and developed links with the Miami-based Cuban American National Foundation. Castro tried improving relations with the capitalist nations. He welcomed Western politicians and investors to Cuba, befriended Manuel Fraga and took a particular interest in Margaret Thatcher's policies in the UK, believing that Cuban socialism could learn from her emphasis on low taxation and personal initiative. He ceased support for foreign militants, refrained from praising FARC on a 1994 visit to Colombia and called for a negotiated settlement between the Zapatistas and Mexican government in 1995. Publicly, he presented himself as a moderate on the world stage.