2015

8.4

1993

5.5

2003

5.8

2002

5.2

2014

4.5

2006

6.0

1987

6.9

2004

6.2

2011

6.4

1995

9.6

2000

7.4

2014

6.0

2005

6.8

1992

6.9

1990

4.7

2018

6.6

2012

6.0

2017

4.9

1971

6.8

2007

7.3