1999

7.6

2012

7.8

2019

8.1

2001

7.9

2005

7.7

2018

6.8

2011

8.3

2014

8.5

2023

7.7

2019

7.8

2004

7.4

2014

7.9

1971

8.2

2015

6.9

2011

6.9

2003

8.0

1995

7.2

1999

8.2

2014

6.8

1995

8.0