1968

7.5

2003

5.8

1996

8.2

2019

8.8

2014

4.5

2012

9.5

2018

7.0

1977

7.3

1983

4.3

1981

5.8

10.0

2023

7.0

2005

9.8

1994

5.7

2017

6.7

2011

3.5