1999

8.4

2022

5.6

2008

6.2

2009

5.3

2020

8.4

2002

7.2

1981

6.6

1977

6.8

2005

7.5

2000

6.0

1973

6.5

1998

6.0

1979

6.2

2012

9.7

2019

8.4

2016

7.6

2020

7.3

2004

7.1

2006

7.8