1999

7.5

2010

7.9

1989

8.0

1992

7.0

1973

7.3

2022

7.8

2017

8.1

2008

8.6

2020

7.6

1987

7.7

2016

8.4

2017

7.7

2004

7.9

2014

8.3

1961

7.5

2019

7.9

2016

7.8

1976

7.9

2006

8.1

1990

6.8