1995

8.1

2008

5.8

1999

7.4

1972

7.9

2004

8.6

2017

3.9

1995

7.9

2013

8.5

2000

7.9

2017

7.6

2005

8.3

2010

7.5

2002

7.7

2008

8.4

1982

7.9

1993

6.6

2009

5.9

2014

7.9

2013

6.6

2011

5.9