2000

8.2

2006

5.6

2001

7.8

2006

5.3

1998

6.8

2005

7.8

2002

7.2

2017

7.3

2018

6.3

2002

7.5

2004

7.3

2021

6.4

1945

7.4

1985

5.3

2006

6.1

2003

6.1

2007

6.7

2004

7.6

1968

7.1

1973

6.9