67% (1997)

61% (1999)

68% (1991)

52% (2000)

71% (2003)

66% (1986)

80% (2015)

64% (2008)

54% (1998)

67% (1995)

67% (1995)

70% (1990)

63% (2005)

82% (2011)

64% (2004)

59% (2011)

59% (1972)

71% (2006)

66% (2006)

64% (2009)