1974

7.5

1970

5.8

1980

6.3

1999

7.1

2002

5.9

1960

7.3

2002

6.3

2016

6.6

2000

3.3

1979

8.1

1910

6.0

1904

7.2

1997

5.7

1925

6.7

2001

6.0

1931

7.2

1932

6.9

1931

7.5

1956

6.5

2004

7.0