1965

6.0

1998

8.7

2008

7.3

1991

7.7

2008

5.8

1991

8.1

2017

7.3

1993

5.6

1990

8.0

2018

7.8

1989

6.8

2005

6.6

2019

8.9

2017

7.5

2004

5.9

2016

6.4

2008

4.9

2016

7.8

2019

7.5

2011

7.5