1988

6.5

1995

5.6

1994

7.4

1987

5.2

1977

7.0

1959

6.1

1995

4.6

1982

6.8

1983

5.8

1996

6.9

1989

5.5

2009

6.6

1984

7.0

2023

8.0

1981

6.3

1981

5.9

1976

7.2

1958

6.9

2005

6.5

1988

7.2