73% (2007)

65% (1995)

56% (2006)

48% (2005)

56% (1997)

49% (2006)

62% (1999)

57% (1993)

48% (1995)

43% (1995)

38% (2008)

38% (2004)

56% (2002)

60% (1994)

49% (1994)

48% (2008)

62% (1996)

57% (1997)

46% (1991)

51% (2011)