1990

5.8

1985

7.1

2005

7.8

2011

8.1

2013

6.9

2005

7.5

1988

5.2

2023

7.6

1973

5.7

2025

5.9

1998

6.1

2002

7.7

2017

6.5

2022

3.9

2013

7.3

1985

6.7

2011

6.9

1989

7.0

2011

7.4