1995

7.8

2010

6.7

1993

7.9

1983

7.3

2007

6.1

1990

6.9

2008

7.7

1973

6.8

2016

6.5

2009

8.0

1997

5.6

2015

5.0

1992

5.8

2020

10.0

2006

6.0

6.5

2020

8.8

2018

7.7

2022

6.0

2010

5.7