36% (2009)

38% (1997)

39% (1994)

46% (2000)

54% (1998)

46% (2007)

39% (1993)

27% (2001)

35% (2005)

60% (2008)

35% (1995)

51% (2001)

32% (1998)

44% (1993)

53% (2009)

49% (1990)

58% (2014)

28% (2003)

44% (1999)

37% (1991)