1970

6.9

1997

6.5

1982

6.9

1992

6.7

1989

7.3

2002

5.6

2000

7.8

1984

7.7

1940

7.4

2015

7.0

2014

6.1

2024

7.4

1999

7.5

1978

7.4

2021

7.8

1991

8.3

2003

7.8

2019

8.5

1954

8.4

1985

8.3