2015

6.0

2001

8.9

1999

5.1

2016

4.5

2009

7.0

1993

6.9

2013

5.0

2018

5.8

2019

6.8

2009

6.7

2008

7.3

2010

6.3

2018

5.2

2013

7.0

2014

6.8

2012

4.7

2021

6.2

1991

6.9

1982

6.6

1988

6.1