2011

6.6

2007

7.7

2009

7.7

2005

7.8

2003

6.9

1998

8.3

2018

7.1

1970

7.6

2011

8.1

2006

5.9

2017

8.1

2001

6.1

2011

7.5

2013

5.7

2024

5.0

1974

8.6

2011

7.4

2004

6.4

1972

4.0

2004

8.0