69% (1987)

66% (1998)

56% (1998)

60% (1997)

53% (2003)

53% (1991)

58% (1992)

69% (2000)

58% (2005)

65% (1986)

49% (1997)

49% (1991)

60% (1999)

43% (2004)

63% (1992)

59% (1999)

64% (1998)

58% (2007)

0% (1996)

63% (1999)