1984

6.5

2006

6.4

2006

5.1

2002

2.0

1993

4.8

1996

4.0

2005

4.3

1969

2.3

1983

6.0

1973

4.9

2005

5.7

1978

3.8

2004

7.3

2009

5.5

2003

5.3

2005

4.0

2006

5.3

2009

5.3

1972

2.7

1989

4.0