2014

8.1

2013

6.9

2004

7.2

1998

8.6

2021

7.2

2015

6.3

2018

7.3

2016

6.8

1994

6.8

2011

6.1

1990

7.9

2014

6.9

2000

7.0

2017

7.5

1995

6.8

1971

7.6

2006

7.5

1982

7.3

2003

7.2

2001

7.6