53% (2007)

54% (2004)

61% (2005)

71% (2007)

40% (1984)

20% (2011)

35% (2009)

54% (2008)

30% (1991)

20% (2000)

60% (2012)

62% (1985)

30% (2010)

52% (2011)

20% (1985)

47% (2009)

20% (1991)

53% (1970)

20% (1982)

20% (1979)