2006

6.8

1998

3.7

2016

5.2

2007

7.4

2004

7.7

1972

6.5

2007

5.0

2008

6.4

2017

6.0

2019

4.0

2006

5.0

2000

6.9

1979

7.0

1991

7.5

1984

6.7

2001

7.3

2003

7.1

1996

6.9

2017

7.3

1983

6.6