64% (2024)

68% (2021)

59% (2013)

63% (2011)

43% (2005)

52% (2008)

52% (1997)

54% (2007)

57% (2008)

36% (2010)

60% (2006)

45% (2004)

43% (2014)

47% (2005)

0% (1970)

26% (2014)

53% (2005)

54% (2012)

48% (2008)

45% (2001)