1992

7.0

2017

6.2

1997

4.0

1978

7.5

1995

7.7

2007

6.6

2010

4.6

2006

5.5

1998

7.3

2008

5.0

2006

6.3

2011

4.0

2013

6.7

2006

7.6

2003

5.8

2013

5.8

2021

6.8

2003

4.7

2022

4.1

2017

3.3