2004

6.4

1998

6.3

1988

7.1

1996

6.6

2016

4.5

1970

5.8

1998

7.2

2008

6.1

1997

6.6

1999

6.9

2001

6.3

1959

7.2

2018

5.0

2001

5.8

1967

5.3

2023

7.3

2013

3.5

2016

8.2

2020

6.8

2001

6.5