64% (1995)

73% (1987)

64% (1984)

55% (2002)

63% (1993)

61% (2002)

56% (1999)

67% (2001)

60% (1996)

60% (2001)

57% (1997)

56% (1991)

72% (1983)

65% (1984)

64% (1983)

67% (1981)

50% (1997)

65% (1985)

0% (1990)

58% (1996)