67% (1999)

62% (2000)

52% (2002)

60% (1995)

59% (2000)

55% (1991)

54% (1991)

60% (2004)

66% (2001)

37% (2003)

54% (1991)

41% (1985)

50% (1995)

52% (1986)

0% (1986)

66% (2002)

72% (1987)

55% (1997)

58% (1999)

0% (1990)