60% (1976)

69% (1996)

92% (1993)

50% (2001)

0% (1998)

70% (1974)

40% (1988)

0% (2002)

85% (2008)

0% (1964)

67% (2004)

0% (1995)

0% (2006)

60% (1980)

0% (1963)

0% (2010)

0% (2007)

60% (1991)

65% (1973)

80% (2001)