2018

7.1

2004

5.7

1993

5.5

1976

4.8

1984

7.2

1989

5.7

2014

4.5

2017

9.4

2008

7.3

1991

6.8

2001

6.8

2000

7.4

2012

4.5

1994

6.5

2003

5.8

2012

6.0

5.7

2013

8.4

1995

6.2

2021

5.3