2017

5.9

2011

5.7

2008

7.7

5.4

2010

7.0

2012

6.4

2003

6.3

1982

5.9

1965

5.5

2011

6.9

2006

5.9

2010

7.9

2012

6.4

2007

5.7

2007

6.9

1984

7.3

2022

6.0

2015

7.4

7.8