56% (2005)

62% (2008)

67% (2007)

52% (2010)

61% (2014)

64% (2013)

65% (2007)

65% (2009)

52% (2004)

60% (2002)

58% (2001)

57% (2003)

61% (2002)

64% (2000)

62% (2001)

64% (2004)

52% (1996)

58% (2006)

71% (2015)

54% (2018)