1999

7.4

1990

6.9

2012

8.3

1992

8.2

2013

7.4

1993

6.6

2004

8.3

2020

7.3

2004

9.5

2018

7.1

2013

8.0

2008

8.3

2020

7.6

2014

7.9

2017

7.7

1984

8.5

2000

7.8

2009

8.6

1998

7.2

2019

7.6