2008

5.8

1985

7.8

2006

7.9

2011

7.1

2001

6.6

2004

8.6

2002

7.5

2006

8.3

1981

8.6

1978

8.4

2017

5.7

2016

5.1

1972

7.7

2009

7.0

2010

6.8

1993

6.7

2009

6.4

2021

6.9

2020

7.3

2020

8.5