1994

6.8

1967

7.3

2004

8.1

1983

7.8

2001

6.7

1987

7.8

2020

6.1

2004

6.9

2020

6.8

2002

5.2

2017

6.3

2001

6.9

1995

6.0

2018

7.0

2003

6.3

2007

5.3

1998

5.9

2005

7.2

1989

5.8

1993

5.1