1982

8.9

2005

7.0

1969

7.1

1998

8.1

2006

7.7

1974

7.7

2017

6.0

2002

7.8

2007

1.9

2005

5.3

1984

6.0

2004

7.4

1999

7.6

1991

7.6

1974

7.5

2019

8.0

1952

7.7

1975

5.8

1984

7.2

1976

7.4