1978

7.5

2004

7.1

2009

6.1

2009

5.4

2008

5.2

1981

6.9

1989

7.1

1986

5.6

2006

5.8

2008

4.9

2007

6.7

2007

4.9

2017

7.6

2019

3.5

1998

4.7

2023

7.2

2024

0.0

2000

7.6

1982

6.9

1987

6.3