1997

6.1

1995

5.6

2013

6.7

2013

5.7

1955

7.2

2007

9.7

2002

4.6

2014

7.7

2004

6.5

2000

6.2

2023

7.5

2009

8.8

1987

5.5

1978

6.6

2011

7.8

2006

6.4

2006

7.0

1985

6.2

2017

6.5

2016

5.5