20% (1980)

67% (1986)

20% (1994)

54% (1988)

54% (2004)

17% (1986)

48% (1984)

55% (1992)

59% (1997)

50% (2006)

60% (1988)

60% (1989)

47% (2005)

57% (2005)

62% (2018)

40% (2004)

53% (2011)

10% (2003)

44% (2004)

45% (1997)