1985

8.3

2001

7.8

1971

6.4

2007

6.1

1944

7.3

1992

5.1

1960

8.4

1987

7.1

1999

6.3

2002

6.0

1974

7.9

1988

7.5

2001

5.8

1968

7.6

1946

7.6

1999

7.1

1941

7.7

2010

5.7

2018

4.3

2020

4.2