2006

5.8

1996

6.4

1990

7.4

2001

7.6

1999

7.9

1986

6.0

2020

7.3

2007

6.8

2018

8.4

2005

6.8

2004

7.7

1998

7.4

2002

6.4

2009

6.2

2009

6.7

1999

7.9