1995

7.7

2018

6.5

1998

7.4

2014

4.7

1969

6.6

1995

5.9

2011

7.0

2018

8.4

2017

7.6

2019

8.1

2015

7.6

1994

8.7

2008

8.5

2019

7.6

1968

8.1

1994

8.5

2018

7.3

2016

7.9

2021

7.1

2014

8.0