2002

7.1

1995

7.6

1983

6.0

1969

8.2

1987

7.5

1984

7.2

2014

5.2

2006

7.0

1983

7.3

2009

7.3

1996

6.4

2001

6.6

2010

8.0

1994

7.9

1976

7.6

2000

4.0

2015

0.0

2012

1.0

2015

6.5

2013

6.7