48% (1998)

62% (2004)

60% (1989)

54% (2007)

59% (2004)

46% (1993)

55% (1993)

58% (2005)

53% (2011)

65% (1985)

51% (2005)

56% (1981)

77% (1982)

52% (1998)

80% (1977)

56% (1999)

52% (1981)

61% (2018)

48% (2009)

59% (2008)