1987

6.2

0.0

1946

5.9

1997

7.4

2005

7.5

2014

6.4

2003

5.8

1956

7.7

1993

7.5

2002

6.9

2000

7.1

1990

7.5

1996

7.9

1994

8.3

1976

8.1

1998

7.8

1995

5.7

1993

7.8

2017

4.7

1972

7.1