1978

5.2

2003

5.7

1915

0.0

1990

7.4

1997

5.7

1965

6.7

1989

7.4

2000

6.5

1966

6.7

1954

7.0

1938

6.6

2008

5.7

1977

5.6

2003

6.3

2008

5.8

2003

6.0

1999

6.3

2002

6.0

1987

4.1

1977

6.8