1995

7.5

1996

7.8

1999

6.8

1985

7.5

2009

7.5

2006

8.2

2013

7.3

2020

6.8

1964

7.9

1995

6.0

2016

6.9

2018

8.1

1972

4.0

1970

5.5

1982

0.0

2012

10.0

1982

8.1

2009

9.0

1987

4.8

2006

5.0