1984

8.1

2018

7.5

1998

8.3

2016

7.9

2017

4.2

1998

6.8

2007

6.5

1987

6.1

2002

5.6

1979

7.1

2016

1.0

2005

0.0

1998

6.6

1970

4.5

1959

7.2

1997

6.6

2020

5.5

1991

6.1

2018

0.0

2016

5.3