68% (1997)

54% (2001)

57% (2006)

66% (1999)

69% (1991)

67% (1989)

70% (1983)

56% (1995)

61% (2015)

69% (1993)

73% (2005)

76% (1980)

72% (1986)

49% (2008)

45% (2007)

70% (2022)

45% (2010)

80% (2014)

0% (1970)