1968

8.1

2013

5.3

1947

6.2

1959

7.8

2000

7.3

2022

7.4

1999

6.0

1995

6.6

2006

6.7

1972

7.8

1997

7.4

1986

7.5

1940

7.9

1983

7.2

1986

7.9

1972

8.7

1974

8.6

2005

6.7

2014

7.9

1994

6.7