1991

8.3

2002

7.0

2003

7.7

1980

8.2

1958

8.2

2005

7.0

2000

7.4

2004

4.8

2017

4.2

2021

7.9

1997

6.5

1998

6.0

1990

5.8

2022

8.0

2005

6.7

2001

6.1

2019

0.0

2002

6.8

2003

7.1

2024

6.0