59% (2010)

66% (2010)

60% (2009)

70% (1996)

63% (2004)

62% (2005)

51% (2010)

54% (1990)

56% (2004)

51% (1989)

52% (2008)

46% (1995)

53% (1999)

58% (1996)

53% (2005)

60% (1997)

47% (2005)

48% (1995)

72% (2003)

67% (1990)