2000

7.6

1996

6.5

2006

6.4

2018

7.0

2016

6.4

2004

7.2

1994

8.7

1991

7.5

2017

7.4

2007

7.3

1966

7.2

1997

6.2

1999

0.0

2005

7.1

2020

7.6

2010

5.2

1971

5.2

1977

7.2

2004

7.7

2016

5.8