2012

7.4

1968

8.1

2008

8.5

1997

7.9

2014

8.0

1978

7.4

1994

8.5

1982

7.5

2007

7.0

2012

7.4

2004

6.5

2007

7.8

2021

7.1

2016

5.9

2020

6.9

1989

8.3

2013

6.9

2008

6.4

2004

8.4

2021

8.0