1999

6.1

1982

7.5

1979

6.8

2001

7.9

1984

7.8

2008

7.8

2001

7.0

2018

7.8

2017

7.8

1990

7.6

2004

8.0

2017

7.5

2018

8.0

2003

7.4

2016

7.1

2017

7.5

1999

6.6

2010

7.5

2012

8.0

1997

7.3