1995

7.0

1991

7.5

1984

6.7

2001

7.3

2016

5.8

2006

6.5

2018

9.3

2007

5.0

2008

6.4

1960

4.0

2007

7.1

2016

0.0

2006

6.9

1972

6.5

2020

6.2

2007

6.7

2021

7.3

2016

5.2

2002

6.0

2007

6.5