1992

6.8

1990

6.9

2003

8.2

2009

8.3

2005

7.0

2023

9.7

2011

7.5

1992

8.5

2004

8.6

2006

7.4

2009

8.4

2013

7.3

2019

8.4

2004

7.3

2015

8.5

2004

5.8

1989

7.8

1988

8.3

1993

7.1

2019

8.0