2006

6.7

2007

6.1

1995

6.0

2017

6.9

2005

5.6

1973

5.7

2020

4.2

2005

6.7

1968

7.6

1991

8.1

1983

6.0

2001

6.2

2021

7.9

2009

6.1

2020

4.9

2002

7.5

2004

7.3

2007

7.4

1963

7.1

1967

6.6