58% (1989)

51% (1994)

58% (1984)

56% (1993)

43% (1999)

60% (1990)

62% (1996)

63% (1992)

56% (1991)

57% (1991)

54% (1992)

53% (1991)

45% (1998)

40% (2005)

49% (1993)

50% (1991)

34% (2006)

36% (2003)

52% (1993)

46% (1989)