1996

6.4

1970

6.4

2011

7.7

2005

8.3

2000

7.6

2002

7.7

2004

7.3

2020

5.5

2012

6.8

2001

4.7

2011

7.3

2002

8.3

2003

5.4

2010

5.6

1999

7.5

1996

7.4

2013

7.3

2000

5.0

2008

0.0

1999

1.0

2005

7.4

1973

7.0

2018

4.4