2008

3.3

1973

5.0

1978

4.9

1974

4.7

1990

4.4

1970

2.5

2001

3.2

2002

3.5

1999

2.9

1989

3.7

1997

2.0

2006

0.0

1977

3.5

2005

6.1

1967

5.1

2002

6.0

1998

2.6

1975

2.3

1973

3.4

1975

5.2