2004

6.6

1991

3.6

1994

7.8

1981

5.6

1998

5.9

2012

5.8

1992

5.9

1986

6.7

1996

5.4

2007

5.1

1993

7.9

2000

0.0

2010

6.9

1979

5.3

2001

2.0

2008

8.4

1985

7.3

1994

4.1

1992

6.4

2003

7.5