35% (1995)

58% (2014)

55% (2009)

45% (2001)

48% (1990)

44% (1999)

46% (2000)

39% (1993)

39% (1994)

53% (1998)

39% (1997)

36% (2009)

55% (1996)

52% (2006)

20% (2002)

45% (2005)

46% (2007)

35% (2005)

55% (2009)

51% (2001)