60% (2002)

50% (1999)

52% (1994)

59% (1999)

59% (1995)

65% (1986)

71% (2008)

75% (1989)

60% (2006)

62% (2005)

50% (2001)

61% (1983)

50% (2000)

53% (1985)

0% (1986)

63% (1993)

0% (1987)

60% (1991)

0% (1993)

48% (1995)