2011

5.5

1989

5.4

1996

5.8

2018

5.8

2017

8.1

2018

6.8

5.6

1961

6.9

1986

7.1

1987

8.0

2004

7.1

2014

6.4

2009

8.5

2013

5.5

2006

5.0

1985

5.3

2001

5.2

1970

6.3

2012

7.4