1993

5.1

1998

3.0

1995

3.2

2012

4.3

1988

3.9

2001

2.8

1986

6.7

1992

4.7

2002

3.7

1994

3.8

2003

2.0

1992

2.5

1998

5.4

1997

3.7

1990

6.3

1999

6.0

1990

5.9

1992

5.5

1995

7.6

1998

1.0

1996

1.3

1990

0.0