1977

6.8

1976

5.5

1987

6.7

2001

5.8

2010

7.1

1992

6.7

1994

6.0

1978

7.1

2012

3.3

2020

9.5

1985

5.9

1956

6.9

1996

6.6

2003

6.2

1973

4.8

1972

0.0

2017

5.8

1989

9.0

1976

5.9

1995

7.1