1964

8.0

2004

6.8

2008

6.4

1983

7.0

2009

5.9

1999

6.4

1975

4.0

2006

6.5

2004

7.0

2016

5.1

2003

6.8

2009

7.5

1949

7.1

1981

0.0

2023

7.2

2023

6.6

1984

4.3

1972

5.3

2014

6.2

2016

5.4