In the late 1980s, largely as a result of events such as the 1982 economic collapse and mass civil resistance in 1983–88, the government gradually permitted greater freedom of assembly, speech, and association, to include trade union and political activity. The government launched market-oriented reforms with Hernán Büchi as Minister of Finance. Chile moved toward a free market economy that saw an increase in domestic and foreign private investment, although the copper industry and other important mineral resources were not opened for competition. In a plebiscite on 5 October 1988, Pinochet was denied a second eight-year term as president (56% against 44%). Chileans elected a new president and the majority of members of a bicameral congress on 14 December 1989. Christian Democrat Patricio Aylwin, the candidate of a coalition of 17 political parties called the ''Concertación'', received an absolute majority of votes (55%). President Aylwin served from 1990 to 1994, in what was considered a transition period.