2000

5.8

1976

7.6

2007

6.9

2004

5.6

2009

7.5

2015

3.0

1995

6.4

2014

6.3

2003

6.2

2016

4.2

2004

3.1

1992

4.9

2005

5.0

2004

3.8

2012

7.1

2003

4.5

1974

3.6

2017

1.0

2007

7.4

2009

4.7