1982

7.4

1985

6.2

2014

7.4

1960

7.8

1998

3.5

2017

6.6

2001

4.7

1989

4.4

2001

5.4

2001

6.9

1980

6.8

2005

4.9

1995

6.9

2006

7.2

2003

3.6

2016

7.9

2008

5.8

2007

5.4

2004

7.1

2007

6.0