1988

7.4

1982

5.8

2009

8.5

1975

6.8

2017

7.8

1991

5.3

2025

6.3

2015

5.8

2011

6.7

2023

6.4

1962

7.9

2024

6.1

2023

5.6

2000

10.0

2004

6.8

1959

6.1

2015

6.2

2024

7.3

2008

6.8