1989

7.8

1981

6.9

1955

7.2

1983

7.4

2017

6.9

2012

8.2

1999

7.1

2003

7.8

1981

7.3

1974

7.0

1977

6.8

1946

7.8

1934

6.9

1989

7.4

2009

6.7

2018

5.6

1952

7.8

2012

7.6

1975

5.8

1985

8.3