2016

7.6

2006

7.4

2004

6.2

1995

8.2

1974

7.0

1988

8.0

1990

7.6

1993

7.9

2016

6.6

1981

8.3

1994

6.8

2017

7.6

2015

6.7

2013

7.3

1972

7.5

2004

8.3

2010

7.8

2014

6.6

2008

7.3