2003

6.9

1997

7.7

2007

6.6

1974

5.7

1962

6.9

1995

4.4

2011

7.2

2006

5.6

1934

6.0

1940

6.6

2015

6.1

1986

7.9

1973

8.2

1950

6.5

1950

6.2

1987

7.0

2018

0.0

1919

6.0

1963

4.2

2020

10.0