2006

7.0

2004

4.6

2003

6.0

2013

4.9

2005

5.9

2001

7.3

1984

6.0

1997

6.8

2005

6.7

2005

6.8

1973

3.7

1975

5.8

1970

7.1

2005

6.2

1967

5.3

2006

5.0

1998

2.4

1975

2.7

2008

5.5

1982

5.2