65% (1997)

54% (2004)

55% (2001)

66% (2008)

57% (2006)

58% (2007)

59% (2000)

69% (2023)

56% (2012)

58% (2016)

71% (2006)

37% (2003)

52% (2000)

60% (2021)

0% (1970)