1996

6.4

2003

7.2

1986

8.4

2004

9.5

1982

7.5

2009

6.7

2014

6.9

2012

8.1

2006

7.1

2020

6.9

2002

7.5

2014

7.3

2008

6.0

2025

7.0

2016

7.6

1989

7.9

2000

6.9

1972

7.7

2007

7.8

2021

7.2