1991

7.0

1986

5.8

2000

6.7

2022

7.1

1997

7.6

2020

5.2

2023

7.9

2009

5.8

1969

5.1

1979

6.3

1998

6.9

1993

6.3

2011

5.7

2010

5.8

2008

5.2

2012

6.9

2001

6.6

1980

6.3

2018

6.9

1994

5.5