1994

7.0

2006

7.7

2014

7.6

2011

8.5

1998

7.2

1990

7.4

1993

7.9

2016

7.8

2001

7.6

2015

7.8

2018

7.8

2021

8.1

2003

8.2

2005

8.2

2006

8.0

1989

6.0

2007

7.5

2015

7.8

1998

7.3

2019

7.9