2010

6.1

1997

7.7

2007

6.3

1995

7.5

2014

8.5

2012

6.4

2002

7.3

2016

7.9

2009

7.6

1998

8.1

2018

7.5

2015

7.3

2014

7.9

2003

7.8

2012

8.2

1940

7.1

2009

7.7

2014

7.4

2015

7.3

2017

7.3