74% (2007)

65% (1995)

49% (2006)

52% (1994)

57% (1993)

56% (1997)

49% (1995)

48% (2008)

48% (2005)

56% (2006)

38% (2004)

38% (2008)

62% (1996)

56% (2002)

44% (1995)

57% (1997)

60% (1994)

61% (1999)

47% (1991)

51% (2011)