1995

6.4

2017

7.0

2008

6.7

2008

7.6

1999

7.1

1983

6.8

1999

7.0

2008

6.8

1980

7.3

2020

6.9

1993

5.6

2023

9.8

2011

6.9

1975

7.2

2009

6.6

1990

8.0

1993

7.1

1990

7.6

2001

6.5

2006

6.9