40% (2001)

30% (2000)

52% (2009)

53% (2008)

56% (2005)

41% (2003)

44% (2009)

52% (2013)

44% (2000)

45% (2003)

43% (2008)

47% (2010)

46% (2005)

47% (1994)

39% (2001)

50% (1993)

59% (2002)

48% (2009)

53% (2005)

44% (1994)