1991

4.9

1964

5.5

2016

5.6

2014

4.6

2014

6.8

1973

6.8

1945

8.1

1992

6.6

2004

7.1

1990

7.0

2001

7.8

1997

7.9

1978

7.4

1989

7.4

2017

7.2

1971

5.8

1983

6.5

1974

5.9

1972

6.2

2023

8.0