1983

5.2

2001

8.1

1992

7.1

1990

7.0

2011

0.0

2017

9.0

1984

7.3

1992

5.4

2002

7.5

2006

6.1

2000

6.2

1987

7.3

2014

8.3

2014

7.0

2005

7.3

2002

8.2

1995

7.7

1994

8.3

2008

7.5

2004

7.3