2015

6.7

2008

6.0

1979

8.2

1999

6.6

2015

7.9

1999

8.4

1995

8.4

1995

8.0

2009

7.6

1985

8.3

2010

8.2

2013

8.1

2004

7.3

1998

7.8

2013

6.1

2014

6.5

1989

7.8

2015

7.3

2005

7.0

2002

7.3