48% (1991)

47% (2002)

53% (1992)

66% (2005)

42% (1999)

62% (1991)

48% (1990)

38% (1987)

41% (2000)

70% (1994)

52% (1985)

35% (2005)

42% (1988)

40% (2002)

0% (1996)