2010

5.6

2013

4.2

2009

6.0

2000

4.4

2003

6.6

2004

5.2

2002

6.2

1991

4.0

1995

6.5

1991

7.4

1967

6.9

1973

3.4

2014

4.8

2020

7.0

1978

6.1

2008

6.8

2010

4.5

2014

3.0

2006

4.5

2019

4.5