71% (2007)

43% (1999)

75% (2006)

58% (1994)

48% (1995)

66% (2002)

58% (2003)

62% (1993)

62% (1997)

59% (2009)

53% (2006)

67% (2006)

53% (1996)

62% (2005)

66% (2001)

53% (2006)

66% (1997)

71% (1994)

62% (2005)

66% (2002)