1990

5.9

2009

5.9

2007

4.0

2017

0.0

2007

7.0

1985

6.6

2008

5.3

1998

7.2

2023

7.6

1999

4.2

1988

2.5

2007

5.4

1970

4.5

2007

5.8

1974

4.8

2018

6.6

2012

6.8

2007

6.2

2013

0.0

2006

7.0