1999

7.5

1985

8.3

1995

5.6

1997

7.9

2007

5.8

2010

8.2

2013

6.9

2021

7.8

2003

6.3

2009

5.5

2013

6.5

2008

6.8

2004

5.9

2006

6.3

2008

7.3

2005

7.7

2020

7.2

2007

6.4

1987

5.2

2004

5.9