1977

6.4

1987

3.7

2014

5.3

1982

4.2

2005

4.9

2004

7.5

2010

6.3

1959

6.2

2011

5.8

1961

0.0

2008

4.1

1941

0.0

1956

8.5

1953

0.0

1965

0.0

1957

5.0

2005

7.3

1975

6.5

1965

0.0

2000

7.2