2007

2.0

2003

0.0

2010

8.0

2015

7.3

2016

8.5

2020

7.1

2014

6.8

2008

5.2

2022

7.5

2023

8.2

2016

7.6

2018

7.4

2021

7.8

2023

7.0

1993

6.6

1999

6.8

1977

7.2

1987

8.4

1986

7.6

1998

7.4