1987

7.6

2014

6.5

2000

7.2

2015

5.7

2004

5.8

2016

6.5

1954

7.2

1970

6.3

1963

6.6

1987

6.5

1965

7.7

1982

6.7

2017

6.0

1979

7.3

2019

7.2

2011

6.0

2011

8.1

2016

5.2

1953

6.8

2001

6.4