71% (1990)

75% (2001)

57% (2006)

63% (1981)

54% (2010)

60% (2003)

63% (2000)

57% (1995)

64% (1986)

0% (2006)

0% (2003)

64% (2005)

70% (1995)

0% (2006)

0% (1997)

30% (2006)

0% (2005)

0% (2000)

50% (2000)

50% (2008)