1996

7.5

1993

6.1

2017

6.0

2009

5.6

2020

5.6

2014

6.5

2021

6.1

1992

5.0

5.6

2003

7.1

2017

5.8

2023

9.4

1982

5.8

5.7

1968

6.9

1941

6.2

1920

6.7

2024

7.3

2022

6.4