2000

6.4

2016

8.2

1996

7.9

1994

8.7

2016

5.9

2009

7.4

1980

8.2

2019

7.1

2019

8.1

2015

6.8

2016

8.2

2013

8.0

2005

8.1

1970

7.3

2006

7.9

1982

7.9

2016

7.0

1991

8.3

1998

7.3

1987

7.3