2015

6.0

2001

6.8

2004

7.9

1995

7.3

1997

6.6

1990

7.4

2007

7.7

2017

6.2

2005

7.5

2007

6.5

2008

3.8

1999

5.6

2018

5.9

1998

7.0

2018

8.5

1999

8.3

2004

7.8