2017

0.0

2006

7.8

2005

8.1

1999

7.6

2013

6.6

1994

7.8

1976

7.4

2000

4.0

1971

7.6

1996

8.5

2007

1.0

2004

6.8

2013

6.8

1994

6.8

2006

7.7

1982

7.0

2007

7.5

1990

7.2

2010

5.0

2021

0.0