1979

7.0

1975

7.2

1970

7.5

1969

6.0

2022

0.0

2007

5.4

2008

7.3

2003

8.1

2005

7.6

2019

7.4

2006

6.8

1984

6.7

1992

6.7

1996

6.7

2019

3.2

2005

6.1

2017

0.0

2009

6.2

1980

6.2

2004

10.0