1971

5.4

2005

3.2

1960

7.5

1966

5.3

1999

1.0

2006

3.5

1995

0.0

1970

6.1

1968

6.7

1968

5.2

1988

5.9

1980

5.8

2008

3.8

1995

3.2

2006

5.0

1962

4.2

1962

7.1

1980

4.9

1935

6.1

1998

4.1