2014

6.5

2015

5.1

2015

6.2

2001

4.3

2017

6.0

1994

6.2

2010

7.0

2008

6.8

3.6

2014

7.6

1996

9.4

2010

7.2

2001

10.0

2009

7.3

1976

3.7

1982

8.1

2020

6.4