1991

6.2

1990

6.7

1993

5.5

1994

5.8

2014

6.7

2007

6.4

2003

7.2

2021

6.7

2023

6.9

1956

7.7

2002

7.1

1909

6.0

2016

8.3

2008

5.5

2017

6.6

2024

7.6

2004

4.4

1995

4.5

2007

6.1

2020

5.0