2020

6.7

2007

6.6

1974

6.5

2001

6.4

2007

7.2

2003

5.6

2007

5.1

1986

4.7

1960

6.5

2017

6.1

1963

7.1

1984

7.0

1991

8.3

1994

8.7

1985

7.0

1984

8.4

2003

7.7

1999

7.5

2006

7.4

1981

8.1