1992

6.3

1970

5.3

1981

3.2

2017

8.5

2007

4.5

2008

5.0

1977

6.8

1972

6.9

2004

5.9

1943

7.5

2002

6.4

2004

6.7

2006

6.2

2009

7.3

1981

7.3

1974

6.6

1981

6.4

2019

7.0

1985

0.0

2017

6.1