1997

6.9

1998

7.2

2002

7.8

1973

6.9

1962

7.9

2004

6.4

1979

7.6

1991

6.6

1956

7.1

1960

7.6

1999

6.5

1999

6.7

1992

7.2

2020

5.0

1920

0.0

1978

0.0

1988

6.5

1998

7.3

2005

5.7

1981

9.0