2009

6.1

2001

6.5

1990

6.4

2014

5.8

1995

6.1

2017

5.7

2018

6.3

1997

6.5

2001

4.5

1991

4.9

2007

4.8

2004

6.5

1996

6.9

1999

6.0

2020

3.5

2007

4.1

2006

5.8

2006

5.1

2008

5.1

1989

0.8