1990

7.5

1993

7.8

1996

7.6

1942

6.0

1946

6.0

2020

5.7

1987

6.2

1985

6.0

1992

7.6

2005

6.2

2006

7.0

1933

6.6

1939

6.0

2015

8.2

1994

6.7

2019

7.2

1975

6.4

1991

5.9

2008

5.8

2010

7.6