2001

7.6

2008

8.3

2014

8.1

2010

8.2

1959

8.5

1983

6.8

2012

7.2

2018

5.1

1984

7.5

1999

6.0

1971

8.1

1997

8.3

1999

7.5

2000

8.0

2012

7.3

2010

7.8

2001

8.6

2010

7.1

2014

7.9

1992

6.9