54% (2004)

65% (2001)

60% (2011)

55% (2005)

63% (2006)

45% (2001)

72% (2006)

72% (1995)

53% (2003)

39% (2004)

62% (2008)

50% (1999)

60% (2008)

48% (2007)

58% (1996)

62% (2009)

35% (2005)

70% (2002)

50% (2005)

65% (2007)