70% (1995)

44% (1993)

58% (1992)

69% (1992)

73% (1994)

58% (1994)

57% (2000)

59% (1994)

60% (1997)

67% (1993)

63% (1996)

60% (1993)

66% (1997)

70% (1997)

47% (2001)

55% (1992)

48% (1991)

55% (1995)

68% (1998)

61% (1996)