1988

7.2

1990

5.8

1976

4.5

2004

5.8

2001

7.1

1979

7.5

2022

8.0

1985

7.1

1966

6.2

2003

5.1

2006

5.2

1986

7.4

1997

6.8

1991

7.1

1996

7.5

1974

6.6

2002

4.5

1922

7.6

1975

6.1

1956

6.9