2004

6.5

1983

6.6

1998

3.7

2007

7.6

1999

6.0

2008

7.0

2020

5.8

1950

5.5

2006

6.8

1989

6.8

2001

7.4

1979

7.5

2017

7.2

2017

6.0

2014

10.0

2020

7.3

1991

2.0

2008

6.3

1976

7.1

2011

0.0