2006

6.7

2003

8.5

5.7

2015

6.4

2022

6.1

2013

7.6

2002

5.8

2005

6.7

2007

6.5

2018

6.8

2021

6.6

2004

7.3

2009

6.1

1995

6.8

2017

6.9

2011

6.5

2018

7.1

1972

7.7

1990

6.3

2018

6.9