1986

7.2

1974

7.5

1994

7.4

1992

6.9

1958

8.2

2009

6.1

2020

7.3

1982

6.7

1979

6.5

2003

7.1

1997

5.6

1970

3.7

2005

5.5

1991

6.4

1978

7.2

1988

5.9

1995

5.5

1971

7.1

1968

6.6

1982

6.8