2002

6.4

2000

7.4

2017

6.7

2008

6.8

2010

4.5

1989

6.0

2004

3.8

1992

4.9

1991

5.6

2009

3.5

1998

5.8

2012

6.3

2011

5.0

2018

5.8

1977

4.1

2011

3.4

1999

5.4

2006

0.0

2019

6.3

2015

4.6