53% (2021)

60% (2019)

51% (2003)

68% (1997)

67% (2009)

68% (1999)

62% (2016)

69% (2012)

56% (2016)

67% (2011)

62% (2006)

65% (2009)

60% (2019)

55% (2013)

59% (2016)

58% (1982)

62% (2016)

61% (2004)

0% (1970)

65% (2005)