1985

7.0

1994

8.5

2016

4.5

2000

0.0

1980

3.1

1961

4.9

2003

6.6

2011

6.3

1992

7.3

1954

0.0

2009

6.7

2009

6.9

2002

6.0

2007

8.1

2005

5.9

2007

7.1

1998

6.6

2006

5.8

2007

6.1

2009

7.1