1956

7.5

1990

6.9

1991

7.4

1978

0.0

2007

6.6

2005

6.4

1994

6.3

2008

6.1

2005

5.3

1984

7.2

2008

5.6

2019

6.6

2020

5.4

1976

7.8

1992

7.0

2020

6.5

1988

6.3

1956

6.0

2004

6.7

1940

8.1