60% (2007)

51% (2006)

58% (2008)

43% (2018)

65% (2008)

64% (2010)

46% (2003)

48% (2018)

61% (1998)

59% (2008)

57% (1997)

54% (2004)

51% (2005)

59% (1973)

52% (2010)

53% (2005)

53% (2006)

51% (2005)

61% (2005)

60% (2015)