2004

7.1

2012

6.3

1988

5.3

1996

6.7

2019

6.2

2021

8.4

2016

7.0

2004

7.8

2004

6.0

2019

6.0

1989

5.1

2008

7.6

2001

9.9

2011

8.6

2018

6.9

1979

7.6

1968

7.4

1999

5.7

2017

5.9

2008

6.5