1990

6.9

1997

8.0

2003

8.4

2001

7.6

2021

7.6

2015

7.4

1990

6.8

2010

8.2

2008

7.5

1999

8.1

2021

8.1

2005

7.3

1995

8.6

2005

8.0

2019

6.7

2005

8.1

1998

8.5

1992

6.8

1995

7.6

2007

7.9