2005

3.6

1941

5.8

2000

7.2

2017

7.4

2018

6.6

2011

7.6

1956

6.1

1985

4.3

1946

7.6

1952

6.7

2001

6.1

1998

6.2

1965

8.0

1997

6.0

1975

7.9

1896

7.1

1972

8.7

2001

5.8

1931

6.9

1976

6.5