72% (1992)

57% (2011)

32% (2005)

60% (1988)

0% (1989)

68% (1994)

0% (1987)

70% (1980)

60% (1986)

0% (1988)

0% (1984)

0% (1986)

0% (1980)

0% (1985)

100% (1987)

0% (1982)

0% (2003)

0% (2007)

70% (1981)

0% (1987)