2010

7.2

2009

4.1

1990

5.8

1986

6.7

1982

6.0

2002

0.0

1988

0.0

1998

6.4

1987

6.0

1993

2.0

1997

0.0

1992

6.0

1991

4.5

1993

6.0

1996

0.0

1995

5.0

1989

0.0

2015

6.8

1977

0.0

1998

0.0