2014

7.4

2009

5.6

2010

7.1

2009

7.5

2008

7.2

2003

6.5

1995

7.5

2018

6.8

2015

7.6

1996

5.8

1973

7.3

2011

4.9

1929

7.9

2017

5.2

2018

4.3

1982

5.4

2001

6.2

2017

8.1

1986

6.7

2016

5.6