1986

7.6

1985

7.7

2009

5.3

2023

8.0

2017

7.3

1997

6.5

1980

6.6

1982

6.4

2005

6.1

1979

4.0

2010

6.2

1990

6.2

1987

5.6

2018

8.0

1998

7.1

2003

5.5

2006

6.4

1999

6.3

1999

5.5

2020

6.4