43% (2008)

57% (1995)

49% (2006)

45% (2004)

43% (2010)

40% (2003)

52% (2007)

55% (2001)

39% (1996)

46% (1999)

33% (2006)

56% (2005)

47% (2003)

44% (2001)

36% (2011)

54% (2001)

50% (2010)

38% (2004)

36% (2010)

30% (1998)