1993

10.0

1997

3.5

1992

6.8

2013

3.2

1984

6.0

1999

3.5

1996

5.5

2005

5.1

1981

6.9

1986

6.3

2008

4.5

2009

4.4

2006

4.7

1984

2.5

1991

5.4

2005

4.3

2009

4.3

1970

3.2

1970

4.1

2008

2.0