1990

7.4

2002

2.5

2005

8.2

2012

5.5

1994

3.0

1994

7.8

1995

6.0

1988

5.7

1995

7.3

1990

7.4

1998

4.2

2007

2.6

2007

5.5

1989

0.0

1991

6.4

2004

5.0

2014

6.3

1984

7.0

1995

6.5

1993

6.9

1991

7.4

1997

6.0

2010

6.5

1992

6.3

1992

6.3

1996

7.5

2006

6.2