1992

6.8

2020

6.2

2021

7.3

0.0

1986

4.7

1997

5.3

2002

5.6

1989

5.9

2008

6.5

2017

7.6

1983

5.5

1977

5.1

2003

6.0

2004

6.6

2005

5.8

2017

7.8

2016

6.1

2001

6.8

2006

5.1

2004

6.1