1985

6.4

2015

5.4

2004

5.7

1990

5.9

2013

8.1

1966

6.7

2024

6.4

2018

6.0

1991

8.0

2021

9.2

1981

7.8

2006

5.5

1996

7.6

2022

7.4

1923

6.2

2025

6.5

2011

6.3

2006

7.0

1975

8.4