2007

6.1

2003

5.5

2002

5.5

1995

4.8

2007

5.2

2012

3.3

2020

0.0

2007

0.0

1999

3.7

2017

6.4

2016

7.0

1968

6.2

2007

6.5

2002

6.6

2006

6.0

2007

0.0

2011

7.3

1963

0.0

1998

4.0

2003

6.0