20% (2010)

30% (1997)

67% (2004)

20% (1994)

0% (1988)

75% (1991)

40% (2010)

80% (1970)

50% (1993)

67% (2008)

70% (2000)

90% (2004)

60% (1997)

60% (2003)

0% (2008)

0% (2010)

20% (2015)

40% (1999)

40% (1983)

50% (1996)