74% (1999)

57% (2008)

68% (1996)

53% (2003)

67% (1993)

56% (2004)

52% (2006)

72% (1988)

39% (2007)

71% (1963)

62% (1985)

60% (2003)

56% (2011)

70% (2015)

56% (2000)

62% (1981)

71% (2017)

63% (2003)

62% (2008)

56% (2006)