2009

5.3

1990

8.5

2010

6.8

1984

6.1

1995

6.8

2004

7.4

2005

7.1

1989

7.2

2008

5.2

1997

8.2

1997

7.4

2006

7.0

1999

8.4

2007

5.7

2009

7.0

2010

7.3

2018

6.9

2023

7.6

1972

7.1

2019

6.2