2006

5.5

1982

6.1

2001

2.7

1986

3.0

1964

5.8

1963

7.5

2005

5.3

1985

5.8

2006

6.2

2004

8.2

2001

0.0

2003

5.0

1999

4.2

1972

4.9

1997

5.0

2010

5.3

1967

6.9

2012

1.0

2014

6.9

2017

8.0