45% (2001)

45% (2004)

43% (2008)

47% (1999)

43% (2010)

57% (1995)

40% (2003)

36% (2011)

49% (2010)

52% (2007)

49% (2006)

36% (2010)

34% (2006)

55% (2001)

38% (2004)

51% (2003)

54% (2001)

42% (2000)

56% (2005)

39% (1996)