1987

7.3

2004

6.3

1989

6.1

1983

7.6

1971

7.2

2017

6.2

1963

7.0

2017

6.0

2000

6.7

1991

4.9

2018

6.0

2008

7.1

1915

6.5

2006

7.8

1983

5.1

1986

5.4

2017

7.3

1992

6.3

1979

5.8

1977

5.0