2003

5.9

1986

6.7

2005

4.2

2002

6.4

2006

3.3

1983

7.3

1999

4.1

1988

4.8

2004

4.8

1984

7.8

2010

6.6

1999

4.2

1997

7.3

1994

4.8

2007

6.1