1996

7.7

2014

7.2

2006

7.8

1999

8.2

1973

8.0

1979

7.8

2015

8.1

1990

7.8

1999

7.5

1968

7.3

1998

7.2

2005

6.7

2016

6.6

2006

7.8

2008

8.1

2014

7.2

2023

6.1

1997

8.0

2011

7.7

2014

7.8