67% (1990)

60% (2010)

50% (1990)

52% (2005)

62% (2005)

60% (2009)

53% (2003)

71% (1996)

33% (1992)

65% (1996)

51% (2010)

47% (2005)

63% (2004)

50% (1995)

42% (1998)

42% (1992)

58% (1996)

53% (2002)

62% (1996)

36% (1997)