2016

7.3

1977

8.6

2002

8.4

2016

7.3

1996

6.8

2016

7.1

2000

8.0

2015

7.6

2013

7.4

2005

8.0

2012

7.5

2012

7.6

1990

7.9

1984

7.8

2015

8.7

2009

7.2

2016

6.6

2002

8.6

2012

7.5

2005

6.6