47% (1993)

61% (2004)

60% (1989)

59% (2004)

53% (2011)

54% (2007)

60% (2012)

57% (2005)

53% (2012)

55% (1993)

52% (1986)

77% (1982)

45% (2004)

55% (1981)

51% (1998)

42% (1998)

80% (1977)

52% (2015)

52% (1996)

57% (2009)