1985

7.0

1998

6.6

1998

7.4

2003

5.0

2008

4.4

2014

6.3

2017

6.3

2021

7.2

2001

6.7

1937

7.9

2001

7.8

2004

7.3

1992

7.7

1981

6.5

1966

7.3

1973

6.8

2007

7.3

1925

7.6

1919

6.0

1986

7.7