1996

8.0

1987

6.3

1976

4.7

2009

6.1

2005

7.4

2002

5.6

1977

7.3

2014

6.9

2008

6.0

2006

7.8

1995

7.6

1987

8.0

2004

7.7

2008

4.9

2009

4.6

2015

5.1

1986

6.9

2014

7.0

2001

4.3

2000

10.0