2005

8.2

2014

7.0

2002

7.7

2015

6.1

2011

5.6

2023

2.0

2016

5.1

1999

8.4

2022

5.5

2007

7.6

2006

8.2

1991

7.7

1996

7.6

2006

7.6

1960

5.0

2001

7.3

2017

7.8

1987

7.8

2019

7.6

2020

8.0