64% (2002)

58% (1995)

58% (1998)

59% (1997)

30% (1992)

78% (1992)

30% (1991)

58% (2002)

55% (1992)

54% (1992)

40% (1992)

40% (2001)

61% (1996)

42% (2002)

63% (1995)

52% (1994)

36% (1988)

62% (1999)

43% (1994)

61% (1990)