2013

10.0

5.7

1970

4.6

2009

4.8

2011

6.4

2015

5.8

2004

6.5

2015

5.3

1996

5.8

1966

7.1

1980

5.2

2003

7.3

2016

6.1

1963

7.6

1992

7.0

1929

5.2

1977

7.0

2002

9.0

2006

5.1

2017

8.1