2016

6.8

2018

7.7

2007

8.1

1997

8.4

1996

6.4

1970

6.2

1974

6.9

2022

6.9

1999

7.4

2005

7.0

1974

7.5

2006

7.3

2014

7.8

2017

6.1

2006

7.9

2015

7.2

2021

6.9

2005

6.8

2002

8.1

2012

6.8