67% (1996)

44% (1994)

58% (1998)

56% (1998)

58% (1992)

51% (1994)

55% (1987)

46% (1989)

59% (1995)

69% (1997)

63% (2005)

45% (2001)

45% (1998)

64% (2005)

55% (1990)

60% (1992)

66% (1982)

47% (1993)

54% (2002)

47% (1993)