1980

5.1

2008

1.6

2004

0.0

1961

5.4

1992

5.0

1992

0.0

1958

5.3

2011

1.0

1977

4.0

2006

5.0

1997

7.2

1974

4.0

1984

3.0

2004

0.0

1988

8.0