1997

7.3

2001

7.5

1992

7.2

2007

7.6

2002

7.9

2012

7.9

1990

6.8

2020

7.6

1995

7.3

2019

6.9

2020

7.8

2000

7.8

2007

7.7

2016

7.4

1986

7.4

2020

8.2

1998

8.7

2017

8.0

2003

7.2

2009

7.2