1964

7.6

1953

4.0

2004

6.8

1959

6.1

1943

0.0

1939

7.6

1946

6.0

1967

7.7

1994

7.3

1951

7.0

2005

9.0

2006

7.0

1997

7.6

1993

7.8

2003

6.6

1996

6.1

1976

6.6

2006

6.8

1994

8.3

1934

7.0