1997

6.6

1998

8.2

2001

7.2

1999

8.0

2008

0.0

2013

7.8

1990

7.4

2005

7.0

2002

5.5

2015

7.8

2000

7.1

1997

7.7

2010

0.0

2002

8.2

2020

6.9

2017

5.9

2021

7.4

2011

7.4

2017

5.0