77% (2010)

68% (2009)

0% (2013)

67% (1999)

65% (2003)

65% (2002)

57% (2006)

20% (2006)

74% (2002)

70% (1997)

82% (1992)

70% (1987)

71% (1996)

60% (2001)

77% (1991)

77% (2020)

79% (2008)

69% (1996)

73% (2008)

84% (2018)