54% (1997)

54% (1989)

52% (2008)

63% (1977)

17% (1986)

61% (2004)

60% (2007)

78% (1981)

53% (2015)

80% (1971)

52% (2006)

48% (2005)

43% (1995)

55% (1978)

59% (2001)

52% (2005)

64% (2002)

64% (2012)

61% (2009)

44% (1999)