32% (1978)

47% (1988)

59% (2023)

63% (1989)

38% (1993)

52% (2014)

34% (2006)

37% (2013)

49% (2008)

33% (2012)

56% (1996)

40% (2005)

46% (2010)

53% (2023)

37% (2009)

52% (1993)

52% (2003)

60% (2023)

41% (2015)

40% (2013)