44% (1990)

47% (2009)

46% (2008)

55% (2010)

58% (2014)

57% (2002)

57% (2016)

42% (2006)

43% (2018)

55% (2016)

64% (2003)

41% (2007)

47% (2014)

49% (2012)

45% (2004)

51% (2017)