1998

7.8

2007

6.5

1996

7.2

2018

6.0

2022

5.4

1975

6.1

1982

6.1

2008

5.5

1983

7.1

2016

6.1

2008

7.2

2005

6.3

2023

6.0

2007

6.1

2023

5.3

2015

7.3

1963

7.9

2002

5.8

2022

5.0

1981

6.4