1982

7.3

2020

8.0

2019

7.4

1979

7.3

2003

7.8

2007

7.9

1993

7.0

1973

6.9

2011

6.3

1995

6.4

2007

7.5

2003

5.3

2006

8.2

2017

6.2

2002

6.8

1963

5.7

1983

7.2

2020

6.7

1991

7.9

2008

7.6