1982

5.9

1994

8.5

1980

8.4

2012

9.4

1998

8.1

2017

6.0

2006

6.9

1982

6.9

2000

8.2

2007

7.6

2009

7.8

2000

4.9

2009

7.4

1999

8.4

2003

8.0

2004

7.1

1963

7.7

2001

6.8

2006

8.2

2003

7.8