1977

6.4

1987

3.7

1982

4.2

2005

4.9

2004

7.5

1959

6.2

1961

0.0

2008

4.1

1941

0.0

1956

8.5

1953

0.0

1965

0.0

1965

0.0

2000

7.2

1964

0.0

1963

0.0

1967

0.0

1967

6.5

1963

7.5

2011

6.6