60% (2009)

43% (2006)

58% (2007)

54% (2009)

60% (2007)

57% (2008)

61% (2010)

52% (2008)

55% (2013)

43% (1996)

61% (2007)

45% (2013)

42% (1998)

53% (2001)

36% (2001)

55% (2011)

52% (2000)

59% (2008)

48% (2002)

44% (1993)