73% (2007)

65% (1995)

56% (2006)

49% (2006)

56% (1993)

61% (1999)

48% (2008)

48% (2005)

56% (1997)

43% (1995)

49% (1994)

49% (1995)

62% (1996)

38% (2004)

60% (1994)

38% (2008)

47% (1991)

56% (2002)

57% (1997)

53% (1989)