60% (2004)

64% (2008)

66% (2007)

69% (2000)

64% (1990)

64% (2002)

69% (2002)

57% (2008)

68% (1992)

61% (2017)

60% (2011)

64% (1996)

55% (1992)

70% (1997)

61% (2010)

69% (2006)

70% (2006)

68% (1999)

69% (1988)

69% (1987)