2009

8.3

2014

6.6

2002

8.6

2011

8.5

2006

7.5

1990

7.9

2010

8.1

1982

7.6

2003

7.9

1989

7.8

2003

7.5

2017

8.4

2018

8.0

2020

8.2

2014

7.8

1988

8.1

2004

6.3

1999

7.4

2015

7.8

1989

8.0