1990

7.4

1992

6.8

1994

7.0

1963

6.8

2005

6.9

1933

4.5

1999

4.5

1922

7.2

1918

5.6

2010

5.2

1969

6.5

1972

6.3

1976

5.2

1941

7.1

1989

7.1

1966

6.7

1928

5.9

1988

6.2

2003

5.3

2003

5.6