2002

6.3

2010

6.9

2004

6.1

2009

7.6

2014

8.5

2010

8.4

1977

8.2

2019

8.1

2015

7.9

2021

7.9

2021

7.8

2016

7.6

2019

7.8

2023

8.1

2016

7.9

2013

7.1

2019

8.5

1998

7.8

2018

7.4

2016

8.2