2002

7.1

1998

8.3

1982

7.9

1984

7.2

1987

6.5

1984

8.1

1993

7.2

1997

7.0

2004

7.1

1995

8.1

1995

7.3

2005

5.9

1994

7.5

2009

6.1

0.0

2017

5.6

2005

7.0

1988

7.8

2003

6.5

1950

8.3