2013

6.1

2017

6.9

2001

6.8

2011

6.6

2017

6.6

2014

5.9

1980

5.9

1978

6.8

8.0

1974

6.3

2013

5.7

2016

6.7

2022

5.6

1996

6.5

1999

6.8

2009

5.9

1974

5.8

2006

4.9

1967

5.6

2024

7.8