1984

6.6

1990

7.5

1986

8.0

2014

6.3

1980

7.1

2004

7.2

2000

6.3

1988

8.1

1980

7.3

1989

5.1

1958

7.6

2018

6.5

2009

7.3

1988

6.1

1990

7.4

2013

5.2

1958

7.6

1985

6.5

1989

7.0

1984

7.1