1997

8.3

1975

7.9

1931

7.1

2004

5.6

1986

6.4

2012

7.0

2007

5.8

2009

7.6

1987

6.2

1998

6.9

2024

0.0

2023

10.0

2011

5.0

2021

9.3

2016

2.0

1966

6.8

2004

6.8

1968

0.0

1971

7.7

2017

7.7