1964

7.1

1992

7.4

1982

5.7

1988

6.3

2007

6.5

2008

8.5

2016

7.2

1996

6.5

1999

3.5

2005

6.4

1970

7.1

2001

7.3

2020

6.5

1986

6.1

2003

5.9

1994

7.5

2000

0.0

2003

5.4

2009

6.6

2017

6.3