67% (1999)

55% (1997)

37% (2003)

59% (2000)

54% (1991)

66% (2001)

52% (2002)

62% (2000)

54% (1991)

58% (1999)

60% (2004)

50% (1995)

58% (1990)

47% (2004)

0% (1989)

51% (2002)

58% (2000)

60% (1995)

42% (1988)

66% (2002)