1971

6.4

1953

7.3

1990

7.4

1992

6.8

2002

4.5

1998

7.3

1946

7.7

1961

4.3

1997

5.1

2003

6.2

1997

4.5

1994

6.5

1976

7.6

2005

6.5

1931

8.3

1968

6.8

1966

7.3

2004

7.8

2014

5.0

1990

4.6