71% (1998)

20% (1992)

20% (2003)

43% (1987)

0% (1996)

20% (1997)

57% (1989)

50% (1989)

20% (1993)

20% (1988)

47% (1983)

70% (1995)

0% (2013)

20% (1983)

20% (1990)

32% (1994)

40% (2001)

30% (1988)

20% (1983)

20% (1988)