1981

7.8

1962

7.4

1959

8.1

1965

7.9

2003

5.7

2008

6.9

1972

10.0

2021

7.4

2005

4.3

2017

7.3

2012

6.0

1985

6.3

2009

5.7

2016

6.5

2009

6.6

1999

7.6

2017

8.0

2015

7.0

2017

5.5

2017

6.3