1971

6.8

2014

6.6

2006

4.1

1994

6.2

1997

6.3

2009

8.5

1984

7.6

2005

6.0

1981

10.0

2020

9.8

2010

5.0

2019

9.0

2024

10.0

1997

5.4

2013

9.8

1993

7.2

1943

6.0

2000

6.0

2011

5.9