2003

7.8

2017

7.2

2009

7.6

2019

8.1

2022

7.7

2017

7.2

2018

6.8

2017

7.8

1997

7.9

2015

7.3

1994

8.7

2012

8.2

2010

8.4

1977

8.2

2016

8.5

2015

7.6

2019

7.8

2015

7.6

1983

8.2

2013

6.7