65% (1995)

56% (2006)

73% (2007)

49% (2006)

48% (2008)

61% (1999)

38% (2008)

43% (1995)

56% (1997)

60% (1994)

49% (2005)

38% (2004)

57% (1993)

62% (1996)

49% (1995)

49% (1994)

67% (1989)

56% (2002)

46% (1991)

57% (1997)