42% (2008)

46% (2004)

49% (2006)

43% (1999)

47% (2003)

55% (2001)

57% (1995)

36% (2011)

42% (2010)

40% (2003)

52% (2007)

34% (2006)

41% (2000)

38% (1996)

56% (2005)

45% (2001)

37% (2010)

44% (1996)

38% (2004)

50% (2010)