1995

5.6

2008

8.9

2021

7.7

1988

5.3

2014

5.2

2004

9.4

2020

7.5

1955

6.1

2016

7.0

1992

6.3

2014

9.5

2012

4.5

2008

6.1

2012

5.8

2005

5.8

2020

6.6