71% (2012)

53% (2009)

60% (2003)

65% (2000)

43% (1993)

70% (2000)

56% (2012)

63% (1998)

65% (2008)

0% (1992)

70% (1992)

57% (2009)

40% (1993)

59% (1994)

0% (2010)

0% (1991)