2005

8.3

1989

8.1

2006

7.7

1979

6.8

2010

7.8

1998

6.8

1993

7.9

1980

8.6

2016

8.0

2009

7.3

2000

7.0

2021

4.7

1966

8.0

2016

7.2

1990

8.3

2014

7.1

2018

7.2

1957

7.6

2004

8.1

2002

8.3