1957

8.1

2014

4.6

2016

6.7

1995

5.9

2002

6.1

1961

7.8

1962

8.0

1963

6.7

1989

6.2

1959

8.0

1965

7.4

1998

8.1

1998

5.2

1982

5.4

2016

6.8

1971

8.2

2007

7.0

1979

7.0

2011

8.0