2007

4.7

2001

2.0

2003

2.8

1980

5.7

2013

7.3

1993

5.8

1972

3.4

2004

4.6

1981

3.9

2004

3.7

1971

2.9

1990

5.2

1982

5.0

1995

2.0

1971

4.8

2000

1.0

1979

5.5

1971

4.2

1977

3.8

1978

4.0