2018

7.1

2002

7.4

2001

6.8

2013

5.7

1970

8.0

2016

6.9

2020

4.3

1997

1.0

1966

6.5

1987

4.0

2009

10.0

2016

5.8

2018

5.0

1998

6.6

2007

8.0

2005

6.8

2006

7.1

2016

7.3

2016

6.3

2016

2.8