71% (2013)

68% (2021)

66% (2007)

66% (2012)

63% (2002)

61% (1998)

61% (2003)

62% (1999)

72% (1995)

62% (2004)

67% (2011)

50% (1996)

65% (2009)

55% (2009)

52% (2007)

67% (2005)

54% (2000)

67% (2002)

68% (1998)

43% (1997)