1980

6.0

2006

2.6

2009

8.5

1997

6.4

1970

4.5

1974

5.6

1945

4.0

2012

3.8

2023

10.0

2013

4.9

2018

6.6

2016

6.2

2000

5.0

2004

5.6

1995

5.5

2000

5.5

1956

4.0