1975

6.4

2023

7.6

2005

7.8

2002

7.7

2008

7.0

2005

5.9

1990

7.4

2014

7.5

2022

6.8

2001

6.7

2008

4.5

1995

6.8

1988

6.1

2006

7.0

2023

7.2

1980

8.2

2002

8.4

1991

7.0

2001

7.4

1987

7.5