2009

7.2

2000

6.7

1947

7.0

2006

6.3

2000

6.3

2012

7.5

2021

8.2

1920

7.9

2021

6.3

1999

7.2

1959

7.4

2009

6.8

1990

6.1

1945

7.6

2015

6.0

1989

7.0

1985

6.5

2001

5.3

1986

4.8

1977

6.8