2004

6.5

1988

7.2

1996

7.9

1997

6.9

1991

7.1

1996

7.4

1966

6.2

1922

7.6

2002

4.4

1975

6.1

1995

6.0

1974

6.6

2003

4.9

1986

7.4

1963

8.3

1985

7.1

2006

5.2

1979

7.5

1931

6.9

1949

5.9