54% (2007)

71% (2005)

72% (2002)

55% (2008)

60% (2005)

58% (2002)

71% (2007)

66% (2012)

70% (2010)

63% (1999)

67% (1999)

67% (2001)

69% (2000)

67% (2004)

54% (2004)

70% (1997)

54% (2006)

54% (2007)

66% (1999)

63% (2006)