1971

5.0

2015

6.6

2011

7.8

2004

9.9

2012

7.7

1990

6.1

1979

6.6

1972

6.3

2009

7.2

2020

6.5

2006

10.0

1988

7.0

1995

4.6

1953

7.3

2023

6.1

1985

6.9

2010

7.7

2011

6.8

2015

8.1

2008

6.7