55% (1992)

43% (1991)

64% (2003)

41% (1989)

71% (2005)

78% (2003)

50% (1983)

60% (1968)

48% (2009)

50% (2020)

58% (2020)

45% (1977)

47% (2009)

61% (1976)

48% (2008)

58% (2014)

46% (2021)

57% (2009)

47% (2010)

46% (2013)