2011

6.9

2018

8.1

2004

7.0

2014

5.7

2006

7.8

2019

7.1

1999

7.9

1986

7.9

1990

7.4

1998

7.8

1998

7.1

2007

6.5

2008

7.7

1994

7.2

1982

6.4

2002

8.2

2016

1.0

2012

7.7

2011

8.0

2017

0.0