1995

5.4

1997

4.4

1997

6.8

2004

6.5

2002

5.5

2004

5.7

2007

5.2

2000

6.0

1971

6.4

1972

6.0

1973

6.1

2006

5.9

1993

6.2

1980

7.7

2009

6.1

2023

4.0

2024

0.0

2025

7.3

1993

6.5