2001

7.4

2007

6.4

2006

6.3

1991

5.9

1996

7.0

1967

6.9

2024

6.0

2003

6.6

2002

5.6

2013

6.4

2004

5.3

2021

1.0

2020

6.3

2003

6.0

2002

5.3

2006

6.1

2014

4.8

1978

6.1

1995

6.5

2023

5.9