74% (1995)

20% (2015)

0% (2007)

20% (2017)

30% (2016)

35% (2004)

40% (1989)

20% (1990)

64% (1988)

20% (1996)

35% (1989)

80% (2015)

20% (1993)

0% (2003)

20% (2000)

15% (2000)

23% (2006)

20% (1988)

0% (1997)

20% (2003)