1996

4.5

2005

8.2

2019

5.6

2015

8.3

2014

8.4

2000

7.6

1993

7.0

1994

7.8

2006

7.5

2004

3.0

1990

5.3

2003

7.6

1998

5.4

2008

6.6

1995

5.0

2005

7.5