1990

6.9

1985

7.2

2010

8.0

1964

7.4

1991

7.0

1962

7.3

2015

6.9

1996

7.6

1963

5.7

2004

8.3

2014

7.3

1996

7.1

2000

7.9

1996

5.3

2017

8.1

2017

7.4

1998

8.5

2017

8.2

1983

6.8

1973

8.0