54% (1993)

47% (1998)

53% (2009)

48% (2014)

61% (1990)

44% (1999)

64% (2001)

48% (2010)

56% (2007)

59% (1997)

40% (2007)

0% (1989)

56% (1996)

58% (2003)

61% (2002)

53% (2008)

54% (2008)

50% (1994)

40% (2001)

25% (2007)