75% (2006)

72% (2007)

71% (2001)

63% (1993)

67% (2006)

53% (2006)

66% (1997)

60% (2009)

66% (2002)

49% (2007)

43% (1999)

54% (2006)

55% (1996)

58% (1994)

62% (2008)

71% (1994)

65% (2002)

66% (1997)

63% (2005)

70% (2002)