2001

7.2

1965

6.8

2003

6.6

2018

7.7

2007

7.3

2020

7.0

2010

6.3

2006

5.7

1970

6.1

2004

7.1

2019

6.8

2014

6.1

2006

6.4

2008

6.9

1979

6.7

1999

8.0

1994

6.8

2016

6.6

1970

7.1

2018

7.6