2019

8.5

2017

7.2

2000

7.8

1987

8.1

1962

8.0

1949

7.5

1984

6.6

2016

7.2

2001

5.8

1990

6.1

1999

7.7

1996

7.9

2003

6.2

2020

5.9

1959

8.0

1968

8.1

1948

7.6

2016

8.2

1963

7.1

2020

6.1