17% (1986)

20% (1980)

67% (1986)

50% (2006)

53% (2011)

59% (1997)

57% (2005)

54% (1988)

54% (2004)

48% (1984)

50% (1992)

35% (1971)

45% (1999)

56% (1993)

10% (1999)

45% (1990)

44% (2004)

40% (2004)

62% (2018)

35% (2001)