1989

7.2

1969

7.8

2011

6.7

1965

6.4

1966

8.0

1987

6.3

2008

6.5

2014

6.6

1967

7.4

2012

5.0

1964

7.5

2009

7.3

1985

6.2

2008

6.8

2016

7.4

2004

6.5

2014

6.8

1984

6.4

1938

7.5

1995

7.3