57% (1998)

52% (2006)

67% (1993)

66% (2015)

60% (1994)

71% (2015)

60% (2011)

61% (1996)

56% (2006)

63% (2003)

64% (2001)

57% (2006)

57% (2007)

54% (2001)

59% (2003)

53% (2010)

60% (2015)

61% (1992)

59% (1989)

61% (2001)