2015

5.0

1999

8.4

2012

8.2

1997

7.9

1994

8.7

2008

8.0

1987

7.8

1957

8.5

2008

8.5

2003

6.7

2012

6.7

2010

7.7

2012

6.9

1994

8.3

2009

7.6

2016

6.0

2019

6.8

1995

8.4

2010

8.4

2016

7.6