54% (2006)

61% (1983)

59% (1995)

58% (1999)

60% (1993)

60% (2003)

68% (1986)

50% (1985)

50% (2002)

57% (2005)

55% (2002)

50% (2001)

60% (1991)

48% (1995)

53% (2011)

49% (1999)

53% (1994)

42% (1994)

10% (1993)

0% (1986)