1984

7.1

2016

5.8

2014

7.8

1968

6.6

2017

7.6

1979

7.6

1986

6.8

2017

7.4

1983

5.5

1982

7.9

1994

7.1

2001

5.2

1958

8.2

2018

5.6

1989

6.3

1947

7.5

1985

6.2

2013

7.2

1941

7.3

1993

6.9