1962

7.3

2008

0.0

1997

6.8

1996

2.4

1990

6.8

2006

6.3

2005

5.9

2007

6.7

1997

6.5

1975

1.0

2005

5.5

2005

3.6

1999

6.0

1973

3.7

2001

6.2

1995

6.5

1961

4.8

1972

6.2

1975

5.7

2004

5.5