1995

7.8

1994

7.8

2017

7.8

1973

6.8

2006

4.6

1997

6.6

2021

8.3

2010

5.7

1973

8.1

1973

8.2

2019

6.4

2005

7.6

2016

7.5

2006

8.1

2013

8.6

2015

8.1

2016

7.2

1999

8.7

1982

7.7

2017

7.7