1999

7.4

1990

7.8

2018

7.7

2018

7.4

2004

7.9

2005

8.2

1987

7.7

2006

8.2

2007

7.6

1991

7.2

1993

8.4

1985

7.6

2023

8.8

1983

7.3

2002

8.6

2013

8.7

2016

7.5

2021

8.0

2013

7.5

2017

8.2