1988

7.2

2004

6.5

2002

4.5

2004

5.8

1979

7.5

2003

5.1

1996

6.9

1991

7.1

1996

7.5

1922

7.7

2006

5.2

1985

7.1

1990

5.8

1986

7.4

1931

6.9

2000

7.8

1987

7.1

1966

6.2

2023

7.0

1974

6.6