1969

0.0

1982

5.9

1976

4.8

1970

4.7

2004

3.8

1985

5.7

1969

5.1

1958

6.1

1985

6.8

1995

6.5

1998

6.7

1995

5.4

2004

7.2

1971

6.8

2001

6.2

2003

7.3

1967

7.5

1989

7.1

2000

6.0

1971

6.4