1987

6.8

1997

7.6

1992

6.9

1958

8.2

2009

6.1

1974

7.5

1994

7.4

1986

7.1

1982

6.7

1979

6.5

1985

6.2

1993

7.2

2017

4.9

1959

6.6

1998

6.9

1954

5.7

1955

5.5

2019

6.5

2003

7.2

2019

7.5