63% (2001)

50% (2001)

62% (2000)

53% (1988)

66% (1991)

67% (1998)

22% (1994)

54% (1996)

48% (2000)

50% (1993)

62% (1994)

60% (1990)

54% (2000)

54% (1997)

50% (1990)

53% (1987)

65% (1998)

40% (1988)

48% (1997)

61% (1998)