2006

6.2

1999

4.1

2011

7.3

2016

8.2

2015

6.8

2019

7.1

1998

7.3

2003

6.7

2017

7.2

2012

7.7

1970

7.3

1996

7.9

2022

7.6

2016

8.2

2005

6.7

1988

7.5

2007

5.9

1991

8.3

1987

7.3

2009

7.4