1979

2.0

1975

8.7

2007

4.2

2009

2.7

2008

5.0

2001

3.7

1986

6.2

1977

5.0

1979

1.0

1982

2.0

2013

0.0

2004

0.0

2014

6.9

2024

6.4

1965

4.0

2000

6.0

1925

0.0

2009

7.2

2005

5.3

2012

6.0