1998

7.7

1996

6.9

1984

6.9

2004

7.2

1999

8.0

1987

7.6

2003

7.8

1996

5.6

1956

0.0

2008

6.3

2016

6.2

1980

3.1

2004

6.3

1979

6.6

1948

7.7

2006

6.4

2013

4.8

2007

7.3

2008

6.7

2007

5.8